Active Exploitation of FortiWeb OS Command Injection Vulnerabilities

Fortinet has disclosed multiple vulnerabilities in its FortiWeb web application firewall, including a critical OS command injection flaw tracked as CVE-2025-64446 and another actively exploited vulnerability, CVE-2025-58034. These vulnerabilities allow authenticated attackers to execute unauthorized code or commands on affected FortiWeb systems via crafted HTTP requests or CLI commands. Fortinet has observed exploitation of these flaws in the wild and has released security updates to address the issues, urging customers to upgrade to the latest versions to mitigate risk. The vulnerabilities impact several FortiWeb versions, and Fortinet has credited researchers from Trend Micro for responsible disclosure.

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has responded by mandating that all federal civilian agencies patch CVE-2025-64446 within seven days, highlighting the severity and active exploitation of the bug. Security researchers have noted that attackers are using HTTP POST requests to create new admin-level accounts on exposed devices, and CISA has recommended disabling HTTP/HTTPS on internet-facing interfaces if immediate patching is not possible. Fortinet has communicated directly with affected customers and emphasized the importance of prompt remediation to prevent further compromise of FortiWeb deployments.