{"schema_version":"1","data":[{"id":3557,"advisory_id":"adaae2b3-60cd-45c4-aa35-0b08d553ef1a","revision":1,"source_id":"core-kev","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-12812","source_published_at":"2021-11-03T00:00:00+00:00","published_at":"2026-10-24T21:37:31.67782+00:00","extraction_method":"structured","technologies":["core-kev","fortios"],"cve_ids":["CVE-2020-12812"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Fortinet FortiOS SSL VPN Improper Authentication Vulnerability","summary":"Fortinet FortiOS SSL VPN contains an improper authentication vulnerability that may allow a user to login successfully without being prompted for the second factor of authentication (FortiToken) if they change the case in their username. CISA required action: Apply updates per vendor instructions.","evidence":"kev:CVE-2020-12812","products":[{"name":{"value":"FortiOS","evidence":"/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2020-12812","aliases":["CVE-2020-12812"],"affected":[],"modified":"2021-11-03T00:00:00.000Z","provider":"kev","references":["https://www.cisa.gov/known-exploited-vulnerabilities-catalog"],"exploitation":{"cwes":["CWE-178","CWE-287"],"cveID":"CVE-2020-12812","notes":"https://nvd.nist.gov/vuln/detail/CVE-2020-12812","dueDate":"2022-05-03","product":"FortiOS","dateAdded":"2021-11-03","vendorProject":"Fortinet","requiredAction":"Apply updates per vendor instructions.","known_exploited":true,"shortDescription":"Fortinet FortiOS SSL VPN contains an improper authentication vulnerability that may allow a user to login successfully without being prompted for the second factor of authentication (FortiToken) if they change the case in their username.","vulnerabilityName":"Fortinet FortiOS SSL VPN Improper Authentication Vulnerability","knownRansomwareCampaignUse":"Known"}},"related_cves":[{"value":"CVE-2020-12812","evidence":"/cveID"}],"security_relevant":true,"severity_evidence":null}}],"next_after":3557,"next_before":3557}