{"id":"CVE-2026-86134","title":"A NULL pointer dereference vulnerability in the WatchGuard Fireware OS authentication process allows a remote, unauthenticated attacker to crash the management daemon by sending a specially request to the login interface, resulting in a …","summary":"A NULL pointer dereference vulnerability in the WatchGuard Fireware OS authentication process allows a remote, unauthenticated attacker to crash the management daemon by sending a specially request to the login interface, resulting in a …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"watchguard","product":"fireware","affected":["fireware >= 12.0, < 12.5.21","fireware >= 12.12, < 12.12.3","fireware >= 2025.0, < 2026.2.3","fireware >= 2026.3, < 2026.3.2"],"patched":["fireware 2026.3.2"],"published":"2026-09-30","updated":"2026-10-06","sourceUpdated":"2026-10-06T17:30:29.910","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-86134","references":[{"url":"https://psirt.watchguard.com/CVE-2026-86134","label":"5d1c2695-1a31-4499-88ae-e847036fd7e3"}],"tags":["nvd","cve.org"],"epss":0.004,"epssPercentile":0.34087,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-30T14:38:22.384700Z"},"scores":{"nvd":7.5,"cna":8.7},"ingestedAt":"2026-09-30T03:56:19.556Z","slug":"CVE-2026-86134","body":"## Overview\n\nA NULL pointer dereference vulnerability in the WatchGuard Fireware OS authentication process allows a remote, unauthenticated attacker to crash the management daemon by sending a specially request to the login interface, resulting in a denial of service.\n\n## Affected\n\n- `fireware >= 12.0, < 12.5.21`\n- `fireware >= 12.12, < 12.12.3`\n- `fireware >= 2025.0, < 2026.2.3`\n- `fireware >= 2026.3, < 2026.3.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `fireware 2026.3.2`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":216613,"id":"CVE-2026-86134","ts":1791310335212,"field":"cvss","old":"8.7","new":"7.5"}]}