CVE-2026-13084: Null Pointer Dereference in WatchGuard Fireware OS iked Process

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-03 · updated 2026-10-25
Weakness: CWE-476

Description

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

Affected products

WatchGuard Fireware OS: from 12.5 before 12.5.19; from 11.0.0 before 11.12.4; from 12.0 before 12.12.1; from 2025.1 before 2026.2.1; 11.12.4, 11.12.4-u1 — fixed in 12.5.19, 11.12.4, 12.12.1, 2026.2.1

How to fix

Upgrade to a fixed version: WatchGuard Fireware OS 12.5.19, 11.12.4, 12.12.1, 2026.2.1. Check the vendor advisory for mitigations.

References

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