CVE-2026-16406

Published Jul 21, 2026

Last updated 4 hours ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-16406 is identified as a privilege escalation vulnerability affecting Mozilla Firefox, specifically impacting its networking component. This flaw is present in Firefox versions up to and including 152. The vulnerability can be exploited remotely, and its exploitation is considered to be easy.

Description
Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
Source
security@mozilla.org
NVD status
Modified
Products
firefox

Risk scores

CVSS 3.1

Type
Secondary
Base score
9.1
Impact score
5.2
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity
CRITICAL

Weaknesses

134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE-693

Social media

Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.

Hype score

16

Configurations