CVE-2026-92079

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Mitigation Bypass in Firefox Widget Win32 Component

Publication date: 2026-09-15

Last updated on: 2026-10-05

Assigner: Mozilla Corporation

Description

Mitigation bypass in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-15

Last Modified

2026-10-05

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-92079

EUVD

EUVD-2026-78464

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	thunderbird	From 154.0 (inc) to 156.0 (exc)
mozilla	firefox	to 153.3.0 (exc)
mozilla	firefox	From 154.0.0 (inc) to 156.0.0 (exc)
mozilla	thunderbird	to 153.3.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-693	The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

Attack-Flow Graph

Executive Summary

This vulnerability is a mitigation bypass in the Widget: Win32 component of Firefox. It allows attackers to bypass certain security measures that were meant to protect the system. The issue was addressed in Firefox version 156 and Firefox ESR version 153.3.

Impact Analysis

If exploited, this vulnerability could allow an attacker to bypass security restrictions, potentially leading to unauthorized access or execution of malicious code on your system. Users of affected Firefox versions should update to the latest version to mitigate this risk.

Compliance Impact

The provided CVE data does not specify how this vulnerability impacts compliance with standards like GDPR or HIPAA. The description only mentions a mitigation bypass in the Widget: Win32 component fixed in Firefox 156 and Firefox ESR 153.3.

Mitigation Strategies

Update Firefox to version 156 or Firefox ESR to version 153.3 or later to address the mitigation bypass in the Widget: Win32 component.

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