CVE-2025-25256Public exploitNetwork attack vector

Unauthenticated command execution via unsafe archive parameters

Published Aug 12, 2025 · Updated Aug 18, 2026

OS command injection in Fortinet FortiSIEM allows remote attackers to execute commands through crafted CLI requests to phMonitor. The handleStorageArchiveRequest routine applies quote-only escaping to attacker-controlled NFS server and archive-directory XML values before building and executing a shell command. Network access to the TLS-wrapped phMonitor service on TCP port 7900 and a Supervisor or Worker node is sufficient; Collector nodes do not reach the vulnerable path.

CVSS severity9.8
Critical
EPSS probability62.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

OS command injection in Fortinet FortiSIEM allows remote attackers to execute commands through crafted CLI requests to phMonitor. The handleStorageArchiveRequest routine applies quote-only escaping to attacker-controlled NFS server and archive-directory XML values before building and executing a shell command. Network access to the TLS-wrapped phMonitor service on TCP port 7900 and a Supervisor or Worker node is sufficient; Collector nodes do not reach the vulnerable path.

The record

CVE
CVE-2025-25256
Published
Aug 12, 2025
Updated
Aug 18, 2026
Vendor
Fortinet
Product
FortiSIEM
Classifications
CWE-78, T1190, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.10.0
  2. Affected versionversion=4.7.2
  3. Affected versionversion=4.9.0
  4. Affected versionversion=5.0.0 <=5.0.1
  5. Affected versionversion=5.1.0 <=5.1.3
  6. Affected versionversion=5.2.1 <=5.2.2
  7. Affected versionversion=5.2.5 <=5.2.8
  8. Affected versionversion=5.3.0 <=5.3.3
  9. Affected versionversion=5.4.0
  10. Affected versionversion=6.1.0 <=6.1.2
  11. Affected versionversion=6.2.0 <=6.2.1
  12. Affected versionversion=6.3.0 <=6.3.3
  13. Affected versionversion=6.4.0 <=6.4.4
  14. Affected versionversion=6.5.0 <=6.5.3
  15. Affected versionversion=6.6.0 <=6.6.5
  16. Affected versionversion=6.7.0 <=6.7.9
  17. Affected versionversion=7.0.0 <=7.0.3
  18. Affected versionversion=7.1.0 <=7.1.7
  19. Affected versionversion=7.2.0 <=7.2.5
  20. Affected versionversion=7.3.0 <=7.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiSIEMversion=4.10.0; version=4.7.2; version=4.9.0; version=5.0.0 <=5.0.1; version=5.1.0 <=5.1.3; version=5.2.1 <=5.2.2; version=5.2.5 <=5.2.8; version=5.3.0 <=5.3.3; version=5.4.0; version=6.1.0 <=6.1.2; version=6.2.0 <=6.2.1; version=6.3.0 <=6.3.3; version=6.4.0 <=6.4.4; version=6.5.0 <=6.5.3; version=6.6.0 <=6.6.5; version=6.7.0 <=6.7.9; version=7.0.0 <=7.0.3; version=7.1.0 <=7.1.7; version=7.2.0 <=7.2.5; version=7.3.0 <=7.3.1

Published CVSS scores

9.8FortinetCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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
T1059.004Unix Shell

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo