CVE-2026-16406

CRITICAL

Mozilla Firefox - Mitigation Bypass in the Networking Component

Title source: rule
STIX 2.1

Description

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

References (3)

Core 3

Scores

CVSS v3 9.1
EPSS 0.0024
EPSS Percentile 15.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-693
Status published
Products (3)
mozilla/firefox < 153.0.0
Mozilla/Firefox 153
Mozilla/Thunderbird 153
Published Jul 21, 2026
Tracked Since Jul 21, 2026