CVE-2026-92057

Analyzed Analyzed - Analysis Complete

Mitigation Bypass in Firefox Enterprise Policies

Publication date: 2026-09-15

Last updated on: 2026-10-05

Assigner: Mozilla Corporation

Description

Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-15

Last Modified

2026-10-05

Generated

2026-10-06

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-92057

EUVD

EUVD-2026-78520

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 Enterprise Policies component of Firefox. It allows attackers to bypass security measures that should prevent unauthorized actions. The issue was addressed in Firefox 156 and Firefox ESR 153.3.

Detection Guidance

This vulnerability is specific to Firefox and Firefox ESR versions before 156 and 153.3 respectively. Detection involves checking installed versions of Firefox or Firefox ESR on systems. Use commands like 'firefox --version' or 'firefox-esr --version' to verify versions. If versions are below the patched releases, the system is vulnerable.

Impact Analysis

If exploited, this vulnerability could allow attackers to bypass security policies enforced by Firefox's Enterprise Policies. This might lead to unauthorized access, data theft, or installation of malicious software on affected systems.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability involves mitigation bypass in Firefox components, but no details are given about data exposure, privacy risks, or regulatory implications.

Mitigation Strategies

Update Firefox to version 156 or Firefox ESR to version 153.3 or later to address the mitigation bypass in the Enterprise Policies component.

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