CVE-2026-86132#
Fireware OS Pre-Authentication Integer Underflow in iked Allows Denial of Service
Summary #
An integer underflow vulnerability in the WatchGuard Fireware OS IKEv2 daemon (iked) allows a remote, unauthenticated attacker to crash the process by sending a specially crafted encrypted IKEv2 message negotiated with an AES-GCM cipher suite.
Product status #
| Product | Affected | Not affected |
|---|---|---|
| Fireware OS | ||
| Default | >= 2026.3, < 2026.3.2, >= 2025.0, < 2026.2.3, >= 12.0, < 12.12.3 | >= 2026.3.2, >= 2026.2.3, >= 12.12.3 |
| T15/T35 | >= 12.0, < 12.5.21 | >= 12.5.21 |
Weakness Type and Impact #
Exploitation Status #
WatchGuard is not aware of any exploitation of this vulnerability in the wild.
Solution #
Fireware OS 2026.3.2, Fireware OS 2026.2.3, Fireware OS 12.12.3, Fireware OS 12.5.21
References #
Credits #
- WatchGuard AI Security Researchfinder