CVE-2020-12812

9.8 CRITICAL CISA KEV - Actively Exploited
Published: July 24, 2020 Modified: October 24, 2025

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://fortiguard.com/psirt/FG-IR-19-283
Source: psirt@fortinet.com
Vendor Advisory
https://fortiguard.com/psirt/FG-IR-19-283
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-12812
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
50.3%
98th percentile
Exploitation Status
Actively Exploited
Remediation due: 2022-05-03

Affected Vendors

fortinet