CVE-2026-13084
HighCVSS 8.7Summary
A null pointer dereference vulnerability in WatchGuard Fireware OS allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted IKEv2 messages. This affects both Mobile User VPN with IKEv2 and Branch Office VPN using IKEv2 when configured with a dynamic gateway peer.
Risk Assessment
The attack can disrupt VPN services, leading to unavailability of remote access for users and branch office connectivity, impacting critical business operations.
Recommendation
Immediately update Fireware OS to a patched version as recommended by WatchGuard. If updating is not possible, temporarily restrict IKEv2 service access to trusted IP addresses only.
Original NVD description (English source)
A null pointer dereference vulnerability in WatchGuard Fireware OS may allow a remote unauthenticated attacker to create a denial-of-service (DoS) condition by sending specially crafted IKEv2 messages. This vulnerability affects both the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer. This vulnerability affects Fireware OS 11.10.2 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2