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CVE-2020-12812CISA KEV

Fortinet FortiOS SSL VPN Improper Authentication Vulnerability

CISA lists this Fortinet FortiOS vulnerability as known exploited. The vendor's advisory has the fixed versions.

CISA KEVVendor advisoryNVD

CISA catalog record

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.

Product
FortiOS
Added to KEV
3 Nov 2021
Federal remediation due
3 May 2022
Known ransomware use
Yes

What changed

First observed 14 Oct 2026

No field changes in the recorded history.

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ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 14 Oct 11:53 UTC · 252 of 253 readable · 251 fully read · documentation 0/409 current

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