CVE-2026-3344: WatchGuard Fireware

Medium severity, CVSS 4.9. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the Fireware OS filesystem integrity check and maintain limited persistence via a maliciously-crafted firmware update package.

Affected products

• WatchGuard Fireware: from 12.0, before 12.11.8 (fixed in 12.11.8); from 12.5.9, before 12.5.17 (fixed in 12.5.17); from 2025.1, before 2026.1.2 (fixed in 2026.1.2)

Published 2026-03-03. Last modified 2026-08-10.