CVE-2020-12812

CRITICALCISA KEV

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published7/24/2020

Last Modified10/24/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorFortinet

ProductFortiOS

Vulnerability NameFortinet FortiOS SSL VPN Improper Authentication Vulnerability

KEV Date Added2021-11-03

Remediation Due Date2022-05-03

Ransomware UseKnown

Affected Products

fortinet:fortios

Weaknesses (CWE)

CWE-178CWE-287CWE-287

References

https://fortiguard.com/psirt/FG-IR-19-283(psirt@fortinet.com)

https://fortiguard.com/psirt/FG-IR-19-283(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-12812(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.