Home › Exploited CVEs › CVE-2020-12812
CVE-2020-12812: Fortinet FortiOS SSL VPN Improper Authentication Vulnerability
Fortinet FortiOS · in CISA KEV since 2021-11-03
2021-11-03added to KEV
2022-05-03federal remediation due date
49.34%EPSS exploit probability (30 days) 98.8th percentile
9.8 CRITICALCVSS 3.1
Knownknown ransomware use
467days from NVD publication to KEV
What it is
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.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-178;CWE-287 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2020-07-24 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2020-12812.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.