Fortinet Fixes Critical FortiSIEM Flaw Allowing Unauthenticated Remote Code Execution
Ravie LakshmananJan 14, 2026Vulnerability / 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…