Fortinet FortiSIEM up to 7.4.0 TCP os command injection

Summaryinfo

A vulnerability was found in Fortinet FortiSIEM up to 7.4.0. It has been classified as critical. The affected element is an unknown function of the component TCP Handler. The manipulation leads to os command injection. This vulnerability is traded as CVE-2025-64155. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Fortinet FortiSIEM up to 7.4.0 and classified as very critical. This issue affects an unknown code block of the component TCP Handler. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at fortiguard.fortinet.com. The identification of this vulnerability is CVE-2025-64155 since 10/28/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/21/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• Fortinet

Name

• FortiSIEM

Version

• 6.7.0
• 6.7.1
• 6.7.2
• 6.7.3
• 6.7.4
• 6.7.5
• 6.7.6
• 6.7.7
• 6.7.8
• 6.7.9
• 6.7.10
• 7.0
• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.1
• 7.1.0
• 7.1.1
• 7.1.2
• 7.1.3
• 7.1.4
• 7.1.5
• 7.1.6
• 7.1.7
• 7.1.8
• 7.2
• 7.2.0
• 7.2.1
• 7.2.2
• 7.2.3
• 7.2.4
• 7.2.5
• 7.2.6
• 7.3
• 7.3.0
• 7.3.1
• 7.3.2
• 7.3.3
• 7.3.4
• 7.4.0

License

• commercial

Website

• Vendor: https://www.fortinet.com/

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Entryinfo

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