{"id":"CVE-2026-86133","title":"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, r…","summary":"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, r…","severity":"high","cvss":8.2,"cvssVector":"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","cwe":["CWE-191","CWE-1284"],"vendor":"WatchGuard","product":"Fireware OS","affected":["fireware_os >= 2026.3 < 2026.3.2","fireware_os >= 2025.0 < 2026.2.3","fireware_os >= 12.0 < 12.12.3","fireware_os >= 12.0 < 12.5.21"],"published":"2026-09-30","updated":"2026-09-30","sourceUpdated":"2026-09-30T00:16:37.087","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-86133","references":[{"url":"https://psirt.watchguard.com/CVE-2026-86133","label":"5d1c2695-1a31-4499-88ae-e847036fd7e3"}],"tags":["nvd","cve.org"],"cvssSource":"cna","ingestedAt":"2026-09-29T23:52:50.545Z","slug":"CVE-2026-86133","body":"## Overview\n\nAn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}