CVE-2025-14733

Out of Bounds Write in WatchGuard Firebox. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 19 December 2025.

Product
WatchGuard Firebox
Added to CISA's catalog
Federal fix-by date
Ransomware
Known to be used in ransomware

CISA’s description.

WatchGuard Fireware OS iked process contains an out of bounds write vulnerability in the OS iked process. This vulnerability may allow a remote unauthenticated attacker to execute arbitrary code and affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer.

Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 3 November 2026.