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Over 10,000 Fortinet Firewalls Vulnerable to MFA Bypass Flaw

First seen 2 Jan 2026, 19:36 UTC • •

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ThreatCluster •March 12, 2026 at 13:27 UTC

More than 10,000 Fortinet firewalls globally are still exposed to CVE-2020-12812, a multi-factor authentication bypass vulnerability. This flaw, linked to improper authentication in FortiOS SSL VPN, was disclosed over five years ago and remains actively exploited, as confirmed by Fortinet in late 2025.

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