The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability was fixed in Firefox     143 and Thunderbird 143. (CVE-2025-10530)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 143.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-77 advisory.

  - Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142.
    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-2025-10537)

  - Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability affects     Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10527)

  - Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component. This     vulnerability affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3.
    (CVE-2025-10528)

  - Same-origin policy bypass in the Layout component. This vulnerability affects Firefox < 143, Firefox ESR <     140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10529)

  - Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability affects Firefox < 143     and Thunderbird < 143. (CVE-2025-10530)

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

The AlmaLinux 9.2 host has a package installed that is affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1787115646 advisory.

  - Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability was fixed in Firefox     143 and Thunderbird 143. (CVE-2025-10530)

  - Mitigation bypass in the Web Compatibility: Tooling component. This vulnerability was fixed in Firefox 143     and Thunderbird 143. (CVE-2025-10531)

  - Modification of specific WebGL shader attributes could trigger an out-of-bounds read, which, when chained     with other vulnerabilities, could be used to escalate privileges. *This bug only affects Thunderbird for     macOS. Other versions of Thunderbird are unaffected.*. This vulnerability was fixed in Firefox 138,     Firefox ESR 128.10, Firefox ESR 115.23, Thunderbird 138, and Thunderbird 128.10. (CVE-2025-4082)

  - A specially crafted filename containing a large number of encoded newline characters could obscure the     file's extension when displayed in the download dialog. *This bug only affects Thunderbird for Android.
    Other versions of Thunderbird are unaffected.*. This vulnerability was fixed in Firefox 138 and     Thunderbird 138. (CVE-2025-4086)

  - Due to insufficient escaping of special characters in the copy as cURL feature, an attacker could trick     a user into using this command, potentially leading to local code execution on the user's system. This     vulnerability was fixed in Firefox 138 and Thunderbird 138. (CVE-2025-4089)

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 143.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-77 advisory.

  - Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142.
    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-2025-10537)

  - Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability affects     Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10527)

  - Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component. This     vulnerability affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3.
    (CVE-2025-10528)

  - Same-origin policy bypass in the Layout component. This vulnerability affects Firefox < 143, Firefox ESR <     140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10529)

  - Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability affects Firefox < 143     and Thunderbird < 143. (CVE-2025-10530)

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 Firefox installed on the remote macOS or Mac OS X host is prior to 143.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-73 advisory.

  - Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142.
    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-2025-10537)

  - Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability affects     Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10527)

  - Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component. This     vulnerability affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3.
    (CVE-2025-10528)

  - Same-origin policy bypass in the Layout component. This vulnerability affects Firefox < 143, Firefox ESR <     140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10529)

  - Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability affects Firefox < 143     and Thunderbird < 143. (CVE-2025-10530)

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 Firefox installed on the remote Windows host is prior to 143.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-73 advisory.

  - Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142.
    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-2025-10537)

  - Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability affects     Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10527)

  - Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component. This     vulnerability affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3.
    (CVE-2025-10528)

  - Same-origin policy bypass in the Layout component. This vulnerability affects Firefox < 143, Firefox ESR <     140.3, Thunderbird < 143, and Thunderbird < 140.3. (CVE-2025-10529)

  - Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability affects Firefox < 143     and Thunderbird < 143. (CVE-2025-10530)

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 a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-4dca10ca2c advisory.

    - New upstream release (143.0)

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.

The remote Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-100ae879e3 advisory.

    - New upstream release (143.0)

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.

ID	Name	Product	Family	Published	Updated	Severity
265634	Linux Distros Unpatched Vulnerability : CVE-2025-10530	Nessus	Misc.	9/20/2025	7/28/2026	medium
265447	Mozilla Thunderbird < 143.0	Nessus	MacOS X Local Security Checks	9/19/2025	1/21/2026	high
360063	AlmaLinux 9.2 [TuxCare] Security Update: thunderbird Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1787115646)	Nessus	Alma Linux Local Security Checks	10/1/2026	10/1/2026	medium
265448	Mozilla Thunderbird < 143.0	Nessus	Windows	9/19/2025	1/21/2026	high
265450	Mozilla Firefox < 143.0	Nessus	MacOS X Local Security Checks	9/19/2025	11/18/2025	high
265449	Mozilla Firefox < 143.0	Nessus	Windows	9/19/2025	11/18/2025	high
265310	Fedora 42 : firefox (2025-4dca10ca2c)	Nessus	Fedora Local Security Checks	9/17/2025	9/20/2025	high
265386	Fedora 41 : firefox (2025-100ae879e3)	Nessus	Fedora Local Security Checks	9/18/2025	9/23/2025	high

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