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Fortinet Confirms Exploitation of FortiCloud SSO Bypass Vulnerability

Fortinet Confirms Exploitation of FortiCloud SSO Bypass Vulnerability

First seen 24 Jan 2026, 04:43 UTC • •

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

Fortinet has confirmed that attackers are actively exploiting a vulnerability in FortiCloud's single sign-on (SSO) authentication, affecting even fully patched devices. The exploitation allows unauthorized access, with attackers bypassing security measures that were thought to be effective following a December patch. Organizations are advised to monitor their systems closely for suspicious activity.

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