CVE-2026-13054: WatchGuard Fireware

High severity, CVSS 7.2. EPSS: 0.6% chance of exploitation in the next 30 days.

A path traversal vulnerability in the WatchGuard Fireware OS Management Web UI allows a privileged authenticated attacker to write arbitrary files on the Firebox's filesystem.

Affected products

• WatchGuard Fireware: from 11.0, before 12.12.1 (fixed in 12.12.1); from 2025.1, before 2026.2.1 (fixed in 2026.2.1); from 11.0, up to and including 12.5.18

Published 2026-07-03. Last modified 2026-08-28.