Critical severity · published Jan 13, 2026
CVE-2025-64155
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…
9.8
CVSS
43.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)43.6% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Fortisiem · Fortinet
6.7.0 before 7.1.9; 7.2.0 before 7.2.7; 7.3.0 before 7.3.5; 7.4.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-64155
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-64155
Vendor Advisory
https://fortiguard.fortinet.com/psirt/FG-IR-25-772
Exploit
https://github.com/horizon3ai/CVE-2025-64155
github.com
https://github.com/purehate/CVE-2025-64155-hunter
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