What’s Vulnerable › Vulnerabilities

CVE-2025-25256

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 65.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-08-12 · updated 2026-08-18
• Weakness: CWE-78

Description

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; from 7.0.0 before 7.0.4; from 7.1.0 before 7.1.8; from 7.2.0 before 7.2.6; from 7.3.0 before 7.3.2 — fixed in 6.7.10, 7.0.4, 7.1.8, 7.2.6, 7.3.2

How to fix

Upgrade to a fixed version: Fortinet FortiSIEM 6.7.10, 7.0.4, 7.1.8, 7.2.6. Check the vendor advisory for mitigations.

References

• https://fortiguard.fortinet.com/psirt/FG-IR-25-152
• https://www.theregister.com/2025/08/13/fortinet_discloses_critical_bug/
• https://github.com/watchtowrlabs/watchTowr-vs-FortiSIEM-CVE-2025-25256
• https://labs.watchtowr.com/should-security-solutions-be-secure-maybe-were-all-wrong-fortinet-fortisiem-pre-auth-command-injection-cve-2025-25256/

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