RCE in Fortinet Fortisiem
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 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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.428 (98.7th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.432 · newest: 0.428 · change: -0.004
Affected products
- Fortinet Fortisiem — versions 7.4.0, 7.3.0, 7.2.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- fortiguard.fortinet.com/psirt/FG-IR-25-772 (Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Exploit, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0
Frequently asked questions
- What is CVE-2025-64155?
- CVE-2025-64155 is a critical-severity vulnerability in Fortinet Fortisiem, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-01-13.
- How severe is CVE-2025-64155?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-64155 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.