{"id":"CVE-2026-86133","state":"PUBLISHED","title":"Fireware OS Pre-Authentication Integer Underflow in iked Allows Remote Denial of Service","description":"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.","publishedAt":"2026-09-29T23:05:47.652Z","updatedAt":"2026-09-30T15:28:13.147Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"WatchGuard"},"assigner":"WatchGuard","products":["WatchGuard Fireware OS"],"affected":[{"vendor":"WatchGuard","product":"Fireware 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