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CVE-2025-64155

Fortinet Fortisiem command injection

9.8 CRITICALPublic exploitEPSS 42.8%
  1. Published13 Jan 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Fortinet Fortisiem≥ 6.7.0 < 7.1.9 · ≥ 7.2.0 < 7.2.7 · ≥ 7.3.0 < 7.3.5 · 7.4.0

Remediation

Fixed in
Fortinet Fortisiem≥ 7.1.9

References

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Frequently asked

Is CVE-2025-64155 being actively exploited?

CVE-2025-64155 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 42.8%.

How severe is CVE-2025-64155?

CVE-2025-64155 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 42.8% probability of exploitation.

Which products are affected by CVE-2025-64155?

Affected products include Fortinet Fortisiem.

How do I fix CVE-2025-64155?

Upgrade affected software to a fixed version, for example Fortinet Fortisiem 7.1.9 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-64155 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.