CVE-2026-86132 – An integer underflow vulnerability in the WatchGuard Fireware OS IKEv2 daemon (iked) allow

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.