CVE-2025-64155: Exploit Code Released for Critical Fortinet FortiSIEM Command Injection Vulnerability
Exploit code has been published for CVE-2025-64155, a critical command injection vulnerability affecting Fortinet FortiSIEM devices.
Key takeaways:
- CVE-2025-64155 is a critical operating system (OS) command injection vulnerability affecting Fortinet FortiSIEM.
- Fortinet vulnerabilities have historically been common targets for cyber attackers, with 23 Fortinet CVEs currently on the CISA KEV list.
- Public exploit code has been released, increasing the likelihood that CVE-2025-64155 could be exploited by attackers.
Background
On January 13, Fortinet published a security advisory (FG-IR-25-772) for CVE-2025-64155, a critical command injection vulnerability affecting Fortinet FortiSIEM.
| CVE | Description | CVSSv3 |
|---|---|---|
| CVE-2025-64155 | Fortinet FortiSIEM Command Injection Vulnerability | 9.4 |
Analysis
CVE-2025-64155 is a critical operating system (OS) command injection vulnerability affecting Fortinet FortiSIEM. A remote, unauthenticated attacker can exploit this flaw to execute arbitrary code using specially crafted requests.
Historical Exploitation of Fortinet Devices
Fortinet vulnerabilities have historically been common targets for cyber attackers, with 23 Fortinet CVEs currently on the Cybersecurity and Infrastructure Security Agency’s (CISA) Known Exploited Vulnerabilities (KEV) list. At the time this blog was published on January 14, CVE-2025-64155 had not been added to the KEV, however we anticipate that it is likely to be added in the near future.
As Fortinet devices have been popular targets for attackers, the Tenable Research Special Operations Team (RSO) has authored several blogs about vulnerabilities affecting these devices. The following table outlines some of the most impactful Fortinet vulnerabilities in recent years.
Proof of concept
On January 13, in coordination with the release of the advisory by Fortinet, researchers at Horizon3.ai published a technical writeup as well as a proof of concept for CVE-2025-64155. While there has been no reports of in-the-wild exploitation, we anticipate that attackers will quickly incorporate this exploit into their attacks.
Solution
The following table details the affected and fixed versions of Fortinet FortiSIEM devices for CVE-2025-64155:
| Product Version | Affected Range | Fixed Version |
|---|---|---|
| FortiSIEM 6.7 | 6.7.0 through 6.7.10 | Migrate to a fixed release |
| FortiSIEM 7.0 | 7.0.0 through 7.0.4 | Migrate to a fixed release |
| FortiSIEM 7.1 | 7.1.0 through 7.1.8 | 7.1.9 or above |
| FortiSIEM 7.2 | 7.2.0 through 7.2.6 | 7.2.7 or above |
| FortiSIEM 7.3 | 7.3.0 through 7.3.4 | 7.3.5 or above |
| FortiSIEM 7.4 | 7.4.0 | 7.4.1 or above |
| FortiSIEM 7.5 | Not affected | - |
| FortiSIEM Cloud | Not affected | - |
Fortinet’s security advisory advises if immediate patching is not able to be performed, they recommend limiting access to the phMonitor port of 7900. We strongly recommend reviewing the advisory for updates as well as the latest on mitigation recommendations.
Identifying affected systems
A list of Tenable plugins for this vulnerability can be found on the individual CVE page for CVE-2025-64155 as they’re released. This link will display all available plugins for this vulnerability, including upcoming plugins in our Plugins Pipeline.
Additionally, customers can utilize Tenable Attack Surface Management to identify public facing assets running Fortinet devices by using the following subscription:
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Join Tenable's Research Special Operations (RSO) Team on the Tenable Community.
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Scott Caveza
Senior Staff Research Engineer, Research Special Operations
Scott joined Tenable in 2012 as a Research Engineer on the Nessus Plugins team. Over the years, he has written hundreds of plugins for Nessus, and reviewed code for even more from his time being a team lead and manager of the Plugins team. Previously leading the Security Response team and the Zero Day Research team, Scott is currently a member of the Research Special Operations team, helping the research organization respond to the latest threats. He has over a decade of experience in the industry with previous work in the Security Operations Center (SOC) for a major domain registrar and web hosting provider. Scott is a current CISSP and actively maintains his GIAC GWAPT Web Application Penetration Tester certification.
Interests outside of work: Scott enjoys spending time with his family, camping, fishing and being outdoors. He also enjoys finding ways to break web applications and home renovation projects.
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