CVE-2022-26318: WatchGuard Firebox and XTM Appliances Arbitrary Code Execution

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2022-03-25. EPSS: 78.2% chance of exploitation in the next 30 days.

On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary code, aka FBX-22786. This vulnerability impacts Fireware OS before 12.7.2_U2, 12.x before 12.1.3_U8, and 12.2.x through 12.5.x before 12.5.9_U2.

Affected products

• WatchGuard Fireware: from 12.0.0, before 12.1.3 (fixed in 12.1.3); from 12.5, before 12.5.9 (fixed in 12.5.9); from 12.7.0, before 12.7.2 (fixed in 12.7.2); version 12.1.3 only; version 12.5.9 only; version 12.7.2 only

Published 2022-03-04. Last modified 2026-06-17.