CVE-2025-9242: Critical Unauthenticated Out-of-Bounds Write Vulnerability in WatchGuard Firebox
On September 17, 2025, WatchGuard released fixes for a critical out-of-bounds write vulnerability (CVE-2025-9242) in the iked process of WatchGuard Fireware OS, which powers their Firebox firewall appliances. This flaw allows a remote unauthenticated threat actor to execute arbitrary code and affects both the mobile user VPN with IKEv2 and the branch office VPN with IKEv2 when configured with a dynamic gateway peer.