CVE-2020-12812
Actively exploited. CVE-2020-12812 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
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.
CSIRTS triage
- What
- An improper authentication vulnerability allows login without second-factor authentication.
- Who is affected
- Users of Fortinet FortiOS SSL VPN are affected.
- Urgency
- Immediate remediation is necessary due to active exploitation and critical severity.
- Action
- Update to the latest version of FortiOS.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2020-12812: Fortinet FortiOS SSL VPN Improper Authentication Vulnerabilitycisa-kev · 2021-11-03
External references
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