CISA Adds Critical WatchGuard Fireware Flaw to KEV
🔒 CISA has added a critical WatchGuard Fireware vulnerability, CVE-2025-9242 (CVSS 9.3), to its Known Exploited Vulnerabilities catalog after evidence of active exploitation. The out-of-bounds write in the OS iked process affects Fireware OS 11.10.2 through 11.12.4_Update1, 12.0 through 12.11.3 and 2025.1 and can allow remote unauthenticated code execution. Researchers at watchTowr Labs attribute the flaw to a missing length check on an identification buffer used during the IKE handshake, which permits a pre‑authentication code path before certificate validation. Shadowserver scans show over 54,300 vulnerable Firebox instances worldwide (about 18,500 in the U.S.), and Federal Civilian Executive Branch agencies are directed to apply WatchGuard patches by December 3, 2025.
