Detections
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Mozilla Firefox ESR < 140.13

critical Nessus Plugin ID 328772

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Synopsis

A web browser installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.

Description

The version of Firefox ESR installed on the remote macOS or Mac OS X host is prior to 140.13. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-70 advisory.

 - Memory safety bugs present in Firefox ESR 140.12 and Firefox 152. 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-2026-16412)

 - We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. (CVE-2026-15718, CVE-2026-15719)

 - Same-origin policy bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. (CVE-2026-16349)

 - Incorrect boundary conditions in the Audio/Video: cubeb component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. (CVE-2026-16350)

 - Use-after-free in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. (CVE-2026-16362)

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

Solution

Upgrade to Mozilla Firefox ESR version 140.13 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2026-70/

Plugin Details

Severity: Critical

ID: 328772

File Name: macos_firefox_140_13_esr.nasl

Version: 1.4

Type: Local

Agent: macosx

Published: 7/21/2026

Updated: 7/31/2026

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.13

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-15719

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

CVSS Score Source: CVE-2026-16412

Vulnerability Information

CPE: cpe:/a:mozilla:firefox_esr

Required KB Items: installed_sw/Mozilla Firefox ESR

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/21/2026

Vulnerability Publication Date: 7/14/2026

Reference Information

CVE: CVE-2026-15718, CVE-2026-15719, CVE-2026-16349, CVE-2026-16350, CVE-2026-16351, CVE-2026-16352, CVE-2026-16353, CVE-2026-16354, CVE-2026-16355, CVE-2026-16356, CVE-2026-16357, CVE-2026-16358, CVE-2026-16359, CVE-2026-16360, CVE-2026-16361, CVE-2026-16362, CVE-2026-16363, CVE-2026-16368, CVE-2026-16369, CVE-2026-16371, CVE-2026-16374, CVE-2026-16375, CVE-2026-16377, CVE-2026-16379, CVE-2026-16381, CVE-2026-16383, CVE-2026-16387, CVE-2026-16390, CVE-2026-16391, CVE-2026-16396, CVE-2026-16405, CVE-2026-16412

IAVA: 2026-A-0755