The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:15892 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    Security Fix(es):

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

    * firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

    * firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

    * firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox     150 and Thunderbird 150 (CVE-2026-6786)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

    * firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

    * firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D     component (CVE-2026-6749)

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

    * firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

    * firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

    * firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird     ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

    * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

    * firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component     (CVE-2026-6764)

    * firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

    * firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

    * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0292 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2026-6786:
    Memory safety bugs present in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149.
    Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of     these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150,     Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6785:
    Memory safety bugs present in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149     and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with     enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed     in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6776:
    Incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox     150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6772:
    Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox     150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6771:
    Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150, Firefox ESR     140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6770:
    Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150, Firefox ESR     140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6769:
    Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150, Firefox ESR     140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6767:
    Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6766:
    Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox     150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6765:
    Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 150,     Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6764:
    Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in     Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6763:
    Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150, Firefox ESR     140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6762:
    Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6761:
    Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR     140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6759:
    Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 150, Firefox ESR     140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6757:
    Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150,     Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6754:
    Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox     ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6753:
    Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150,     Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6752:
    Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150,     Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6751:
    Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox     150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6750:
    Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150,     Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6749:
    Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability     was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6748:
    Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox     150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6747:
    Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10,     Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-6746:
    Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

    CVE-2026-5734:
    Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and     Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with     enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects     Firefox < 149.0.2, Firefox ESR < 140.9.1, Thunderbird < 149.0.2, and Thunderbird < 140.9.1.

    CVE-2026-5732:
    Incorrect boundary conditions, integer overflow in the Graphics: Text component. This vulnerability     affects Firefox < 149.0.2, Firefox ESR < 140.9.1, Thunderbird < 149.0.2, and Thunderbird < 140.9.1.

    CVE-2026-5731:
    Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox     149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume     that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability     affects Firefox < 149.0.2, Firefox ESR < 115.34.1, Firefox ESR < 140.9.1, Thunderbird < 149.0.2, and     Thunderbird < 140.9.1.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of thunderbird installed on the remote host is prior to 140.10.0-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3290 advisory.

    Double-Free / Use-After-Free (UAF) in the `IntoIter::drop` and `ThinVec::clear` functions in the thin_vec     crate. A panic in `ptr::drop_in_place` skips setting the length to zero. (CVE-2026-6654)

    Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, and Firefox ESR 140.10. (CVE-2026-6746)

    Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150 and Firefox ESR     140.10. (CVE-2026-6747)

    Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150     and Firefox ESR 140.10. (CVE-2026-6748)

    Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability     was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10. (CVE-2026-6749)

    Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150,     Firefox ESR 115.35, and Firefox ESR 140.10. (CVE-2026-6750)

    Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150     and Firefox ESR 140.10. (CVE-2026-6751)

    Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150,     Firefox ESR 115.35, and Firefox ESR 140.10. (CVE-2026-6752)

    Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150 and     Firefox ESR 140.10. (CVE-2026-6753)

    Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox     ESR 115.35, and Firefox ESR 140.10. (CVE-2026-6754)

    Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150 and     Firefox ESR 140.10. (CVE-2026-6757)

    Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150 and Firefox     ESR 140.10. (CVE-2026-6761)

    Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, and Firefox ESR 140.10. (CVE-2026-6762)

    Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150 and Firefox     ESR 140.10. (CVE-2026-6763)

    Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in     Firefox 150 and Firefox ESR 140.10. (CVE-2026-6764)

    Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 150 and     Firefox ESR 140.10. (CVE-2026-6765)

    Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox     150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6766)

    Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, and Firefox ESR 140.10. (CVE-2026-6767)

    Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150 and Firefox     ESR 140.10. (CVE-2026-6769)

    Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150 and Firefox     ESR 140.10. (CVE-2026-6770)

    Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Firefox     ESR 140.10. (CVE-2026-6771)

    Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox     150, Firefox ESR 115.35, and Firefox ESR 140.10. (CVE-2026-6772)

    Incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox     150 and Firefox ESR 140.10. (CVE-2026-6776)

    Memory safety bugs present in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149     and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with     enough effort some of these could have been exploited to run arbitrary code. (CVE-2026-6785)

    Memory safety bugs present in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149.
    Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of     these could have been exploited to run arbitrary code. (CVE-2026-6786)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:17690 advisory.

    Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and     portability.

    Security Fix(es):

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

    * firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

    * firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

    * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

    * firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox     150 and Thunderbird 150 (CVE-2026-6786)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

    * firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

    * firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D     component (CVE-2026-6749)

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

    * firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

    * firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

    * firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird     ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

    * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

    * firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component     (CVE-2026-6764)

    * firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

    * firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

    * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

    * firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

    * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Thunderbird installed on the remote Windows host is prior to 150.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-33 advisory.

  - Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component. This vulnerability     was fixed in Firefox 150 and Thunderbird 150. (CVE-2026-6783)

  - Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6746)

  - Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10,     Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6747)

  - Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox     150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6748, CVE-2026-6751)

  - Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability     was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
    (CVE-2026-6749)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2026-fb08ad61f2 advisory.

    Update NSS to 3.122.1     Update to Firefox 150.0


    ----

    - New upstream release (149.0.2)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2026-69538c9f7e advisory.

    Update NSS to 3.122.1     Update to Firefox 150.0

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1652 advisory.

    Double-Free / Use-After-Free (UAF) in the `IntoIter::drop` and `ThinVec::clear` functions in the thin_vec     crate. A panic in `ptr::drop_in_place` skips setting the length to zero. (CVE-2026-6654)

    Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, and Firefox ESR 140.10. (CVE-2026-6746)

    Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150 and Firefox ESR     140.10. (CVE-2026-6747)

    Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150     and Firefox ESR 140.10. (CVE-2026-6748)

    Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability     was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10. (CVE-2026-6749)

    Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150,     Firefox ESR 115.35, and Firefox ESR 140.10. (CVE-2026-6750)

    Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150     and Firefox ESR 140.10. (CVE-2026-6751)

    Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150,     Firefox ESR 115.35, and Firefox ESR 140.10. (CVE-2026-6752)

    Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150 and     Firefox ESR 140.10. (CVE-2026-6753)

    Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox     ESR 115.35, and Firefox ESR 140.10. (CVE-2026-6754)

    Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150 and     Firefox ESR 140.10. (CVE-2026-6757)

    Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150 and Firefox     ESR 140.10. (CVE-2026-6761)

    Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, and Firefox ESR 140.10. (CVE-2026-6762)

    Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150 and Firefox     ESR 140.10. (CVE-2026-6763)

    Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in     Firefox 150 and Firefox ESR 140.10. (CVE-2026-6764)

    Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 150 and     Firefox ESR 140.10. (CVE-2026-6765)

    Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox     150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6766)

    Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR     115.35, and Firefox ESR 140.10. (CVE-2026-6767)

    Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150 and Firefox     ESR 140.10. (CVE-2026-6769)

    Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150 and Firefox     ESR 140.10. (CVE-2026-6770)

    Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Firefox     ESR 140.10. (CVE-2026-6771)

    Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox     150, Firefox ESR 115.35, and Firefox ESR 140.10. (CVE-2026-6772)

    Incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox     150 and Firefox ESR 140.10. (CVE-2026-6776)

    Memory safety bugs present in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149     and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with     enough effort some of these could have been exploited to run arbitrary code. (CVE-2026-6785)

    Memory safety bugs present in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149.
    Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of     these could have been exploited to run arbitrary code. (CVE-2026-6786)

    Information disclosure due to incorrect boundary conditions in the Audio/Video component. This     vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, and Firefox ESR 115.35.1.
    (CVE-2026-7320)

    Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This     vulnerability was fixed in Firefox ESR 140.10.1. (CVE-2026-7321)

    Memory safety bugs present in Firefox ESR 115.35.0, Firefox ESR 140.10.0, Thunderbird ESR 140.10.0,     Firefox 150.0.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we     presume that with enough effort some of these could have been exploited to run arbitrary code. This     vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, and Firefox ESR 115.35.1.
    (CVE-2026-7322)

    Memory safety bugs present in Firefox ESR 140.10.0, Thunderbird ESR 140.10.0, Firefox 150.0.0 and     Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with     enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed     in Firefox 150.0.1 and Firefox ESR 140.10.1. (CVE-2026-7323)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXSA:2026-1236:15 advisory.

    * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)
      * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)
      * firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)
      * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)
      * firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)
      * firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)
      * firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)
      * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox     150 and Thunderbird 150 (CVE-2026-6786)
      * firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)
      * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)
      * firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)
      * firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D     component (CVE-2026-6749)
      * firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)
      * firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)
      * firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)
      * firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)
      * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)
      * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird     ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)
      * firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)
      * firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component     (CVE-2026-6764)
      * firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)
      * firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)
      * firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)
      * firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component     (CVE-2026-6776)
      * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)
      * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1     (CVE-2026-7323)
      * firefox: thunderbird: Information disclosure due to incorrect boundary conditions in the Audio/Video     component (CVE-2026-7320)
      * firefox: thunderbird: Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1     (CVE-2026-7322)
      * firefox: thunderbird: webrtc: Sandbox escape due to incorrect boundary conditions in the WebRTC:
    Networking component (CVE-2026-7321)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2026-10767 advisory.

    [140.10.0-1.0.1]
    - Fix firefox-oracle-default-prefs.js for new nss [Orabug: 37079773]
    - Add firefox-oracle-default-prefs.js and remove the corresponding Red Hat file

    [140.10.0-1]
    - Update to 140.10.0 ESR

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2026-10766 advisory.

    [140.10.0-1.0.1]
    - Fix firefox-oracle-default-prefs.js for new nss [Orabug: 37079789]

    [140.10.0]
    - Add debranding patches (Mustafa Gezen)
    - Add OpenELA default preferences (Louis Abel)

    [140.10.0-1]
    - Update to 140.10.0 ESR

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2026-19704 advisory.

    - Update to 140.10.0 ESR [Orabug: 39499844][CVE-2026-6746][CVE-2026-6747]       [CVE-2026-6748][CVE-2026-6749][CVE-2026-6750][CVE-2026-6751][CVE-2026-6752]       [CVE-2026-6753][CVE-2026-6754][CVE-2026-6757][CVE-2026-6759][CVE-2026-6761]       [CVE-2026-6762][CVE-2026-6763][CVE-2026-6764][CVE-2026-6765][CVE-2026-6766]       [CVE-2026-6767][CVE-2026-6769][CVE-2026-6770][CVE-2026-6771][CVE-2026-6772]       [CVE-2026-6776][CVE-2026-6785][CVE-2026-6786]
    - Update to 140.9.1 ESR [Orabug: 39324689][CVE-2026-5731][CVE-2026-5732]       [CVE-2026-5734][CVE-2026-33416][CVE-2026-33636]
    - Update to 140.9.0 ESR [Orabug: 39361657][CVE-2026-4684][CVE-2026-4685]       [CVE-2026-4686][CVE-2026-4687][CVE-2026-4688][CVE-2026-4689][CVE-2026-4690]       [CVE-2026-4691][CVE-2026-4692][CVE-2026-4693][CVE-2026-4694][CVE-2026-4695]       [CVE-2026-4696][CVE-2026-4697][CVE-2026-4698][CVE-2026-4699][CVE-2026-4700]       [CVE-2026-4701][CVE-2026-4702][CVE-2026-4704][CVE-2026-4705][CVE-2026-4706]       [CVE-2026-4707][CVE-2026-4708][CVE-2026-4709][CVE-2026-4710][CVE-2026-4711]       [CVE-2026-4712][CVE-2026-4713][CVE-2026-4714][CVE-2026-4715][CVE-2026-4716]       [CVE-2026-4717][CVE-2026-4718][CVE-2026-4719][CVE-2026-4720][CVE-2026-4721]
    - Update to 140.8.0 ESR [Orabug: 39361647][CVE-2026-2447][CVE-2026-2757]       [CVE-2026-2758][CVE-2026-2759][CVE-2026-2760][CVE-2026-2761][CVE-2026-2762]       [CVE-2026-2763][CVE-2026-2764][CVE-2026-2765][CVE-2026-2766][CVE-2026-2767]       [CVE-2026-2768][CVE-2026-2769][CVE-2026-2770][CVE-2026-2771][CVE-2026-2772]       [CVE-2026-2773][CVE-2026-2774][CVE-2026-2775][CVE-2026-2776][CVE-2026-2777]       [CVE-2026-2778][CVE-2026-2779][CVE-2026-2780][CVE-2026-2781][CVE-2026-2782]       [CVE-2026-2783][CVE-2026-2784][CVE-2026-2785][CVE-2026-2786][CVE-2026-2787]       [CVE-2026-2788][CVE-2026-2789][CVE-2026-2790][CVE-2026-2791][CVE-2026-2792]       [CVE-2026-2793]
    - Update to 140.7.0 ESR [Orabug: 38940976][CVE-2025-14327][CVE-2026-0877]       [CVE-2026-0878][CVE-2026-0879][CVE-2026-0880][CVE-2026-0882][CVE-2026-0883]       [CVE-2026-0884][CVE-2026-0885][CVE-2026-0886][CVE-2026-0887][CVE-2026-0890]       [CVE-2026-0891]
    - Update to 140.6.0 ESR [Orabug: 38813993][CVE-2025-14321][CVE-2025-14322]       [CVE-2025-14323][CVE-2025-14324][CVE-2025-14325][CVE-2025-14328]       [CVE-2025-14329][CVE-2025-14330][CVE-2025-14331][CVE-2025-14333]
    - Update to 140.5.0 ESR [Orabug: 38708474][CVE-2025-13012][CVE-2025-13013]       [CVE-2025-13014][CVE-2025-13015][CVE-2025-13016][CVE-2025-13017]       [CVE-2025-13018][CVE-2025-13019][CVE-2025-13020]
    - Update to 140.4.0 ESR [Orabug: 38595697][CVE-2025-11708][CVE-2025-11709]       [CVE-2025-11710][CVE-2025-11711][CVE-2025-11712][CVE-2025-11714]       [CVE-2025-11715]
    - Update to 140.3.0 [Orabug: 38509157][CVE-2025-10527][CVE-2025-10528]       [CVE-2025-10529][CVE-2025-10532][CVE-2025-10533][CVE-2025-10536]       [CVE-2025-10537]

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
313744	RHEL 9 : thunderbird (RHSA-2026:15892)	Nessus	Red Hat Local Security Checks	5/11/2026	5/11/2026	critical
314513	TencentOS Server 4: firefox (TSSA-2026:0292)	Nessus	Tencent Local Security Checks	5/14/2026	5/14/2026	critical
314564	Amazon Linux 2 : thunderbird, --advisory ALAS2-2026-3290 (ALAS-2026-3290)	Nessus	Amazon Linux Local Security Checks	5/14/2026	5/14/2026	medium
314752	RHEL 10 : firefox (RHSA-2026:17690)	Nessus	Red Hat Local Security Checks	5/14/2026	5/14/2026	critical
309100	Mozilla Thunderbird < 150.0	Nessus	Windows	4/21/2026	5/7/2026	medium
310077	Fedora 44 : firefox / nss (2026-fb08ad61f2)	Nessus	Fedora Local Security Checks	4/24/2026	5/8/2026	medium
310573	Fedora 42 : firefox / nss (2026-69538c9f7e)	Nessus	Fedora Local Security Checks	4/28/2026	5/13/2026	medium
315631	Amazon Linux 2023 : firefox (ALAS2023-2026-1652)	Nessus	Amazon Linux Local Security Checks	5/20/2026	5/20/2026	medium
326294	MiracleLinux 9 : thunderbird-140.10.1-1.el9_8.ML.1 (AXSA:2026-1236:15)	Nessus	Miracle Linux Local Security Checks	7/10/2026	7/10/2026	critical
310663	Oracle Linux 10 : firefox (ELSA-2026-10767)	Nessus	Oracle Linux Local Security Checks	4/28/2026	10/27/2026	critical
310731	Oracle Linux 8 : firefox (ELSA-2026-10766)	Nessus	Oracle Linux Local Security Checks	4/28/2026	10/27/2026	critical
321178	Oracle Linux 7 : firefox (ELSA-2026-19704)	Nessus	Oracle Linux Local Security Checks	6/16/2026	10/27/2026	critical

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