{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-121528", "assignerOrgId": "6abe59d8-c742-4dff-8ce8-9b0ca1073da8", "state": "PUBLISHED", "assignerShortName": "fortinet", "dateReserved": "2026-11-03T14:32:10.363Z", "datePublished": "2026-11-11T21:31:53.978Z", "dateUpdated": "2026-11-11T21:31:53.978Z"}, "containers": {"cna": {"affected": [{"vendor": "Fortinet", "product": "FortiOS", "cpes": ["cpe:2.3:o:fortinet:fortios:7.6.4:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:7.6.3:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:7.6.2:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:7.6.1:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:7.6.0:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:7.4.9:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:7.4.8:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:7.4.7:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:7.4.6:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:7.4.5:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:7.4.4:*:*:*:*:*:*:*", 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"cpe:2.3:o:fortinet:fortios:6.4.16:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.15:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.14:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.13:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.12:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.11:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.10:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.9:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.8:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.7:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.6:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.5:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.4:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.3:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.2:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.1:*:*:*:*:*:*:*", "cpe:2.3:o:fortinet:fortios:6.4.0:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "versions": [{"versionType": "semver", "version": "7.6.0", "lessThanOrEqual": "7.6.4", "status": "affected"}, {"versionType": "semver", "version": "7.4.0", "lessThanOrEqual": "7.4.9", "status": "affected"}, {"versionType": "semver", "version": "7.2.0", "lessThanOrEqual": "7.2.13", "status": "affected"}, {"versionType": "semver", "version": "7.0.0", "lessThanOrEqual": "7.0.19", "status": "affected"}, {"versionType": "semver", "version": "6.4.0", "lessThanOrEqual": "6.4.16", "status": "affected"}]}], "descriptions": [{"lang": "en", "value": "A improper certificate validation vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2.0 through 7.2.13 may allow a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the communication channel between the SSLVPN web portal and the backend destination website."}], "providerMetadata": {"orgId": "6abe59d8-c742-4dff-8ce8-9b0ca1073da8", "shortName": "fortinet", "dateUpdated": "2026-11-11T21:31:53.978Z"}, "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-295", "description": "Improper access control", "type": "CWE"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C"}}], "solutions": [{"lang": "en", "value": "Upgrade to FortiOS version 8.0.0 or above\nUpgrade to FortiOS version 7.6.5 or above\nUpgrade to FortiOS version 7.4.10 or above\nUpgrade to FortiOS version 7.2.14 or above"}], "references": [{"name": "https://fortiguard.fortinet.com/psirt/FG-IR-26-193", "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-193"}]}}}

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