CVE-2023-36553Known exploitationNetwork attack vector

Unauthenticated command execution via crafted API requests

Published Nov 14, 2023 · Updated Dec 16, 2025

OS command injection in the Fortinet FortiSIEM report server allows remote attackers to execute commands through crafted API requests. The report server passes attacker-controlled API input to an operating-system command without neutralizing command-special elements. No authentication or user interaction is required, and successful exploitation executes unauthorized code or commands in the report server's security context.

CVSS severity9.8
Critical
EPSS probability1.88%
Next 30 days · Sep 16, 2026
Known exploitationReported
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 the Fortinet FortiSIEM report server allows remote attackers to execute commands through crafted API requests. The report server passes attacker-controlled API input to an operating-system command without neutralizing command-special elements. No authentication or user interaction is required, and successful exploitation executes unauthorized code or commands in the report server's security context.

The record

CVE
CVE-2023-36553
Published
Nov 14, 2023
Updated
Dec 16, 2025
Vendor
Fortinet
Product
FortiSIEM
Classifications
CWE-78, T1190, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 2025Record 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

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

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
9.8NIST NVDCVSS: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 exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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

Reported exploitation

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