CVE-2020-12812Actively exploitedAdded to KEV 2021-11-03Known ransomware campaign use

Fortinet FortiOS SSL VPN Improper Authentication Vulnerability

Fortinet, FortiOS

Description

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.

CVSS severity for this advisory hasn't been enriched from NVD yet, check back shortly.

EPSS, exploit probability

High

45.4%

estimated chance of real-world exploitation in the next 30 days, higher than 98.8% of every CVE FIRST.org scores

Refreshed 10/28/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.

Required action

Apply updates per vendor instructions.

CISA-recommended due date: 2022-05-03

CWE-178 CWE-287

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