CVE-2025-64155Public exploitNetwork attack vector

Root command execution via cluster_url argument injection

Published Jan 13, 2026 · Updated Jan 13, 2026

OS command injection in Fortinet FortiSIEM allows remote attackers to execute commands as root via crafted TCP requests. The unauthenticated phMonitor handleStorageRequest path passes cluster_url to elastic_test_url.sh, which treats injected --next and -o options as curl arguments and writes attacker-controlled content to an arbitrary file. Overwriting an admin-writable script run by root each minute converts the file write into full appliance compromise without credentials or user interaction.

CVSS severity9.8
Critical
EPSS probability45.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Fortinet FortiSIEM allows remote attackers to execute commands as root via crafted TCP requests. The unauthenticated phMonitor handleStorageRequest path passes cluster_url to elastic_test_url.sh, which treats injected --next and -o options as curl arguments and writes attacker-controlled content to an arbitrary file. Overwriting an admin-writable script run by root each minute converts the file write into full appliance compromise without credentials or user interaction.

The record

CVE
CVE-2025-64155
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
Fortinet
Product
FortiSIEM
Classifications
CWE-78, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.7.10
  2. Affected versionversion=7.0.4
  3. Affected versionversion=7.1.8
  4. Affected versionversion=7.2.6
  5. Affected versionversion=7.3.0 <=7.3.4
  6. Affected versionversion=7.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiSIEMversion=6.7.10; version=7.0.4; version=7.1.8; version=7.2.6; version=7.3.0 <=7.3.4; version=7.4.0

Published CVSS scores

9.8Fortinet, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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