CVE-2025-64155

Name: CVE-2025-64155
Creator: NVD / NIST
Published: 2026-01-13T17:15:58.44+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 42.65%

Last modified Jun 17, 2026

CVE-2025-64155 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSIEM 7.4.0, FortiSIEM 7.3.0 through 7.3.4, FortiSIEM 7.1.0 through 7.1.8, FortiSIEM 7.0.0 through 7.0.4, FortiSIEM 6.7.0 through 6.7.10 may allow an attacker to execute unauthorized code or commands via crafted TCP requests.. EPSS estimates a 42.65% chance of exploitation in the next 30 days.

Description

An improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSIEM 7.4.0, FortiSIEM 7.3.0 through 7.3.4, FortiSIEM 7.1.0 through 7.1.8, FortiSIEM 7.0.0 through 7.0.4, FortiSIEM 6.7.0 through 6.7.10 may allow an attacker to execute unauthorized code or commands via crafted TCP requests.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

42.65%

98.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Fortinet	Fortisiem	>= 6.7.0, < 7.1.9
Fortinet	Fortisiem	>= 7.2.0, < 7.2.7
Fortinet	Fortisiem	>= 7.3.0, < 7.3.5
Fortinet	Fortisiem	7.4.0

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-772Vendor Advisory
https://github.com/horizon3ai/CVE-2025-64155Exploit, Third Party Advisory
https://github.com/purehate/CVE-2025-64155-hunter

Timeline

Published: Jan 13, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-64155?

How severe is CVE-2025-64155?

CVE-2025-64155 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 42.65% probability of exploitation in the next 30 days.

How do I fix CVE-2025-64155?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-64155?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST