CVE-2026-86133 – An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows

An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a specially crafted encrypted IKEv2 message, resulting in a denial of service.