CVE-2026-16406

Modified Modified - Updated After Analysis

Networking Component Mitigation Bypass in Firefox

Publication date: 2026-07-21

Last updated on: 2026-07-22

Assigner: Mozilla Corporation

Description

Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-21

Last Modified

2026-07-22

Generated

2026-08-10

AI Q&A

2026-07-21

EPSS Evaluated

2026-08-09

NVD

CVE-2026-16406

EUVD

EUVD-2026-46244

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	to 153.0.0 (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 is a mitigation bypass vulnerability in Firefox's Networking component. It allows attackers to bypass security measures that were meant to prevent certain types of attacks. The issue was resolved in Firefox version 153.

Detection Guidance

This CVE lacks specific detection methods or commands in the provided context. General detection would involve checking Firefox version against 153 or later and monitoring for unusual network activity.

Impact Analysis

If exploited, this vulnerability could allow unauthorized access to network resources or sensitive data. Attackers might bypass firewalls or other security controls, potentially leading to data breaches or further network compromise.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR or HIPAA if it results in unauthorized data access or breaches. Organizations using affected Firefox versions may face penalties for failing to protect sensitive data adequately.

Mitigation Strategies

Update Firefox to version 153 or later to address the mitigation bypass in the Networking component.

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