CVE-2025-64155Fortisiem OS Command Injection
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…
Published Jan 13, 2026 · Updated Feb 26, 2026
Key Facts
Patch immediately- CVE-2025-64155 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Fortisiem (Fortinet).
- It is exploited in the wild, listed in Industry KEV feed since Jan 15, 2026. Public exploit code is available.
- EPSS estimates a 43% probability of exploitation in the next 30 days.
- Fixed versions are available, including Fortisiem 7.1.9.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
43%
Higher than 98.6% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
41/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Jan 15, 2026
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jan 15, 2026 | n/a | Not reported |
Affected Products
11 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| FortisiemFortinet | 6.7.10, 7.0.4, 7.1.8, 7.2.6, 7.3.0, 7.3.1, 7.3.2, 7.3.3 | 7.1.9 |
Patched Releases
Fortisiem
7.1.9
Timeline
Publicly disclosed
Jan 13, 2026
Added to Industry KEV feed
Jan 15, 2026
Last updated
Feb 26, 2026
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
FAQ
Common Questions.
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 comm…
Affected: Fortisiem (Fortinet) versions 6.7.10, 7.0.4, 7.1.8, 7.2.6, 7.3.0, 7.3.1, 7.3.2, 7.3.3. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Jan 15, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Fortisiem 7.1.9.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2025-64155 On Your Attack Surface?
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