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Risky Bulletin: Improperly patched bug exploited again in Fortinet firewalls

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Risky Bulletin: Improperly patched bug exploited again in Fortinet firewalls

Fortinet FortiGate firewalls are being actively exploited through CVE-2025-59718, a vulnerability that was inadequately patched in previous updates. Attackers are bypassing SSO authentication using generic usernames, provisioning administrative accounts, and exfiltrating device configurations. Fortinet has acknowledged the new exploitation method to select customers via private communications.

Why it matters: Organizations running vulnerable FortiGate instances should immediately verify patch status and monitor for unauthorized admin accounts and SSO bypass attempts, as public exploitation is ongoing.

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vulnerabilities

Risky Bulletin: Improperly patched bug exploited again in Fortinet firewalls

Fortinet FortiGate firewalls are being actively exploited through CVE-2025-59718, a vulnerability that was inadequately patched in previous updates. Attackers are bypassing SSO authentication using generic usernames, provisioning administrative accounts, and exfiltrating device configurations. Fortinet has acknowledged the new exploitation method to select customers via private communications.

Why it matters: Organizations running vulnerable FortiGate instances should immediately verify patch status and monitor for unauthorized admin accounts and SSO bypass attempts, as public exploitation is ongoing.

VendorsFortinet
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