Fortinet Fixes Critical FortiSIEM Flaw Allowing Unauthenticated Remote Code Execution
Jan 14, 2026
Vulnerability / Patch Management
Fortinet has released updates to fix a critical security flaw impacting FortiSIEM that could allow an unauthenticated attacker to achieve code execution on susceptible instances. The operating system (OS) injection vulnerability, tracked as CVE-2025-64155 , is rated 9.4 out of 10.0 on the CVSS scoring system. "An improper neutralization of special elements used in an OS command ('OS command injection') vulnerability [CWE-78] in FortiSIEM may allow an unauthenticated attacker to execute unauthorized code or commands via crafted TCP requests," the company said in a Tuesday bulletin. Fortinet said the vulnerability affects only Super and Worker nodes, and that it has been addressed in the following versions - FortiSIEM 6.7.0 through 6.7.10 (Migrate to a fixed release) FortiSIEM 7.0.0 through 7.0.4 (Migrate to a fixed release) FortiSIEM 7.1.0 through 7.1.8 (Upgrade to 7.1.9 or above) FortiSIEM 7.2.0 through 7.2.6 (Upgrade to 7.2.7 or above) FortiSIEM 7.3.0 thr...
