CVE-2025-25256: PoC Available for FortiSIEM Remote Unauthenticated Command Injection Vulnerability
On August 12, 2025, Fortinet released fixes for a critical-severity vulnerability in FortiSIEM, tracked as CVE-2025-25256. The flaw arises from improper neutralization of special elements used in an OS command within the phMonitor service (TCP/7900). Successful exploitation could allow a remote, unauthenticated threat actor to execute unauthorized code or commands via crafted CLI requests.