CVE-2026-3342 HIGH

CVE-2026-3342: WatchGuard Firebox Out of Bounds Write Vulnerability

Vendor Watchguard
Product Fireware OS
Weakness CWE-787
Published March 3, 2026
Last update March 4, 2026
View on NVD All CVEs

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an authenticated privileged administrator to execute arbitrary code with root permissions via an exposed management interface. This vulnerability affects Fireware OS 11.9 up to and including 11.12.4_Update1, 12.0 up to and including 12.11.7 and 2025.1 up to and including 2026.1.1.

Key dates

02Disclosure timeline

March 3, 2026 CVE published
March 4, 2026 Record updated