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CVE-2020-12812Fortinet FortiOS SSL VPN Improper Authentication Vulnerability
An improper authentication vulnerability in SSL VPN in FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and below may result in a user being able to log in successfully without being prompted for the second factor of authentication (FortiToken) if they changed the case of their username.
9.8 CRITICALEPSS 45.37%⚡ Known Exploited (CISA KEV)NVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.8 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 7.5 | HIGH | 3.1CISA-ADP | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| 7.5 | HIGH | 2.0NVD | AV:N/AC:L/Au:N/C:P/I:P/A:P |
CISA required action
⚡ Known exploited · remediation due May 3, 2022
Apply updates per vendor instructions.
Details
- CVE ID
- CVE-2020-12812
- Status
- Analyzed
- Assigner (CNA)
- fortinet
- Published
- Jul 24, 2020
- Last modified
- 2026-10-02 14:54 UTC
Affected Products
As published by the CNA in the CVE record.
Fortinet FortiOS1 version range
- FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and below