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Fortinet VPN Exploit Actively Targeted in Real-World Attacks

Fortinet VPN Exploit Actively Targeted in Real-World Attacks

First seen 27 Dec 2025, 02:09 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

Fortinet has reported that a five-year-old security vulnerability in its FortiOS SSL VPN software, identified as CVE-2020-12812, is being actively exploited in real-world attacks. This flaw allows attackers to bypass two-factor authentication under certain conditions, affecting users with misconfigured or unpatched systems. The advisory was released on December 24, 2025.

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