CVE Watch—

CVE-2020-12812

Fortinet FortiOS SSL VPN Improper Authentication Vulnerability

CVSS

—

No CVSS

EPSS

49.3%

p99

KEV

YES

Nov 3, 2021

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

49.3%EPSS · 30 days49.3%

2026-06-302026-07-16

KEV catalog record

Product

Fortinet / FortiOS

Vulnerability

Fortinet FortiOS SSL VPN Improper Authentication Vulnerability

Added to KEV

Nov 3, 2021

Remediate by

May 3, 2022

Known ransomware use

Yes

Summary 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.

Required action

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2020-12812

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