CVE-2025-25256: Fortinet Fortisiem

Critical severity, CVSS 9.8. EPSS: 64.7% chance of exploitation in the next 30 days.

An improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability [CWE-78] vulnerability in Fortinet FortiSIEM 7.3.0 through 7.3.1, FortiSIEM 7.2.0 through 7.2.5, FortiSIEM 7.1.0 through 7.1.7, FortiSIEM 7.0.0 through 7.0.3, FortiSIEM 6.7.0 through 6.7.9, FortiSIEM 6.6 all versions, FortiSIEM 6.5 all versions, FortiSIEM 6.4 all versions, FortiSIEM 6.3 all versions, FortiSIEM 6.2 all versions, FortiSIEM 6.1 all versions, FortiSIEM 5.4 all versions, FortiSIEM 5.3 all versions, FortiSIEM 5.2 all versions, FortiSIEM 5.1 all versions, FortiSIEM 5.0 all versions, FortiSIEM 4.10 all versions, FortiSIEM 4.9 all versions, FortiSIEM 4.7 all versions allows an unauthenticated attacker to execute unauthorized code or commands via crafted CLI requests.

Affected products

• Fortinet Fortisiem: from 5.4.0, before 6.7.10 (fixed in 6.7.10); from 7.0.0, before 7.0.4 (fixed in 7.0.4); from 7.1.0, before 7.1.8 (fixed in 7.1.8); from 7.2.0, before 7.2.6 (fixed in 7.2.6); from 7.3.0, before 7.3.2 (fixed in 7.3.2)

Published 2025-08-12. Last modified 2026-08-18.