Detections
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Linux Distros Unpatched Vulnerability : CVE-2026-92240
critical Nessus Plugin ID 346408
Synopsis
The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.Description
The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.- A malicious or compromised IMAP server can trigger an out-of-bounds read in the IMAP response parser by sending an untagged '* ID' response, crashing Thunderbird. The affected parsing path is reachable before authentication. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3. (CVE-2026-92240)
Note that Nessus relies on the presence of the package as reported by the vendor.
Solution
There is no known solution at this time.See Also
Plugin Details
Severity: Critical
ID: 346408
File Name: unpatched_CVE_2026_92240.nasl
Version: 1.2
Type: Local
Agent: unix
Family: Misc.
Published: 9/16/2026
Updated: 9/16/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.3
Percentile: 53.38
CVSS v2
Risk Factor: Medium
Base Score: 5.8
Temporal Score: 4.9
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:P
CVSS Score Source: CVE-2026-92240
CVSS v3
Risk Factor: Critical
Base Score: 9.1
Temporal Score: 8.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C
Vulnerability Information
CPE: cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:thunderbird, p-cpe:/a:debian:debian_linux:thunderbird, p-cpe:/a:redhat:enterprise_linux:thunderbird
Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 9/15/2026
Reference Information
CVE: CVE-2026-92240