High · published July 3, 2026
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
| Product | Versions | Fixed in |
|---|---|---|
| watchguard/fireware | ≥ 12.5, < 12.5.19 | 12.5.19 |
| watchguard/fireware | ≥ 11.0.0, < 11.12.4 | 11.12.4 |
| watchguard/fireware | all versions | — |
| watchguard/fireware | all versions | — |
| watchguard/fireware | ≥ 12.0, < 12.12.1 | 12.12.1 |
| watchguard/fireware | ≥ 2025.1, < 2026.2.1 | 2026.2.1 |