CVE-2026-13722: WatchGuard Fireware

High severity, CVSS 7.2. EPSS: 0.3% chance of exploitation in the next 30 days.

WatchGuard Fireware OS contains a firmware validation bypass when processing a backup image via the backup/restore feature. An authenticated administrator can exploit this vulnerability to install a tampered firmware image.

Affected products

• WatchGuard Fireware: from 2025.1, before 2026.2.1 (fixed in 2026.2.1); from 12.5, up to and including 12.5.18; from 12.0, before 12.12.1 (fixed in 12.12.1); from 11.0.0, before 11.12.4 (fixed in 11.12.4); version 11.12.4 only

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