CVE entry · CVE-2025-14733
CVE-2025-14733: WatchGuard Firebox Out of Bounds Write Vulnerability
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.
- Actively exploited: added to CISA’s KEV catalog on December 19, 2025.
- Used by ransomware, according to CISA.
- Remediation deadline for US federal agencies: December 26, 2025.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes WatchGuard Firebox, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.