Over 600 Fortinet FortiGate firewall instances have been hacked in an AI-powered campaign that exploits exposed ports and weak credentials, AWS reports. The attacks, observed between January 11 and February 18, did not target known vulnerabilities. Instead, they focused on the exploitation of exposed device configurations across globally dispersed appliances. According to AWS, the campaign was carried out by an unsophisticated threat actor that relied on multiple commercial gen-AI services to implement known attack techniques.
Cybersecurity company Arctic Wolf said it observed active intrusions involving malicious single sign-on (SSO) logins on FortiGate appliances on December 12, 2025. The attacks exploit two critical authentication bypasses (CVE-2025-59718 and CVE-2025-59719, CVSS scores: 9.8). Patches for the flaws were released by Fortinet last week for FortiOS, FortiWeb, FortiProxy, and FortiSwitchManager. "These vulnerabilities allow unauthenticated bypass of SSO login authentication via crafted SAML messages, if the FortiCloud SSO feature is enabled on affected devices," Arctic Wolf Labs said in a new bulletin.