Mozilla Thunderbird < 140.7.2

high Nessus Plugin ID 299211

Synopsis

A mail client installed on the remote Windows host is affected by a vulnerability.

Description

The version of Thunderbird installed on the remote Windows host is prior to 140.7.2. It is, therefore, affected by a vulnerability as referenced in the mfsa2026-11 advisory.

- Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, Firefox ESR < 115.32.1, Thunderbird < 140.7.2, and Thunderbird < 147.0.2. (CVE-2026-2447)

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

Solution

Upgrade to Mozilla Thunderbird version 140.7.2 or later.

Plugin Details

Severity: High

ID: 299211

File Name: mozilla_thunderbird_140_7_2.nasl

Version: 1.1

Type: local

Agent: windows

Family: Windows

Published: 2/16/2026

Updated: 2/16/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-2447

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:mozilla:thunderbird

Required KB Items: installed_sw/Mozilla Thunderbird

Exploit Ease: No known exploits are available

Patch Publication Date: 2/16/2026

Vulnerability Publication Date: 2/16/2026

Reference Information

CVE: CVE-2026-2447

Detections

Analytics