#VU121224 OS command injection in FortiSIEM - CVE-2025-64155

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Main Vulnerability Database Vulnerabilities #VU121224

#VU121224 OS command injection in FortiSIEM - CVE-2025-64155

Published: January 13, 2026 / Updated: January 16, 2026


Vulnerability identifier: #VU121224
Vulnerability risk: Critical
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Red
CVE-ID: CVE-2025-64155
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability: Public exploit is available
Vulnerable software:
FortiSIEM
Software vendor:
Fortinet, Inc

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in phMonitor. A remote unauthenticated attacker can send specially crafted packets to port 7900/TCP and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Install updates from vendor's website.

External links