{"id":"CVE-2026-84393","title":"A improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6, FortiProxy 7.6.2 through 7.6.6 may allow attacker to information disclosure via <insert attack vector here>","summary":"A improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6, FortiProxy 7.6.2 through 7.6.6 may allow attacker to information disclosure via <insert attack vector here>","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-297"],"vendor":"Fortinet","product":"FortiOS","affected":["FortiOS >= 7.6.1 <= 7.6.6","FortiProxy >= 7.6.2 <= 7.6.6"],"published":"2026-09-08","updated":"2026-09-10","sourceUpdated":"2026-09-10T04:18:18.120","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84393","references":[{"url":"https://fortiguard.fortinet.com/psirt/FG-IR-26-174","label":"psirt@fortinet.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-09T00:00:00+00:00"},"scores":{"nvd":8.1,"cna":7.3},"epss":0.00155,"epssPercentile":0.05032,"ingestedAt":"2026-09-08T19:08:49.602Z","slug":"CVE-2026-84393","body":"## Overview\n\nA improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6, FortiProxy 7.6.2 through 7.6.6 may allow attacker to information disclosure via <insert attack vector here>\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":5589,"id":"CVE-2026-84393","ts":1788890890945,"field":"cvss","old":"7.3","new":"8.1"}]}