Mar 4CISA Alerts
Fortinet Releases Guidance to Address Ongoing Exploitation of Authentication Bypass Vulnerability CVE-2026-24858
Fortinet has disclosed a new authentication bypass vulnerability (CVE-2026-24858) affecting FortiOS, FortiManager, FortiWeb, FortiProxy, and FortiAnalyzer when FortiCloud SSO is enabled, allowing attackers with a FortiCloud account to access devices registered to other users. Active exploitation has been observed, including unauthorized firewall configuration changes, account creation, and VPN modifications. Fortinet temporarily disabled FortiCloud SSO on January 26, 2026, reinstating it with mi