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CVE-2023-34992VulnerabilityPublished Updated

CVE-2023-34992: Fortinet FortiSIEM · Execute unauthorized code or commands

Affects Fortinet FortiSIEMSource CVE Database V5

0

Not known to be exploited · public detection template (Nuclei) · 81% EPSS · CVSS 9.6 Critical.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
9.6Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
81.6% chance of exploitation in 30 days – higher than 99% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:X/RC:X

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Oct 2023

  2. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  3. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  4. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Affected software

ProductAffectedFixed in
Fortinet FortiSIEMAffected
  • =7.0.0
  • =6.7.0
  • =6.6.0
  • =6.5.0
  • =6.4.0
Fixed in–

AI-suggested

Given the absence of official patches at this time, European organizations should implement the following specific mitigations: 1) Immediately restrict access to the FortiSIEM API interfaces by applying network segmentation and firewall rules to limit API exposure only to trusted management networks. 2) Employ strict access control lists (ACLs) and VPNs to protect administrative interfaces. 3) Monitor FortiSIEM logs and network traffic for unusual API requests or command execution patterns indicative of exploitation attempts. 4) Disable or limit API functionality if not required for operational needs. 5) Conduct thorough audits of FortiSIEM configurations and user privileges to minimize attack surface. 6) Prepare for rapid deployment of patches once Fortinet releases them by establishing a vulnerability management process prioritizing FortiSIEM updates. 7) Consider deploying web application firewalls (WAFs) or intrusion prevention systems (IPS) with custom rules to detect and block malicious API payloads targeting command injection. 8) Educate security teams on this vulnerability to enhance detection and response capabilities. These targeted actions go beyond generic advice by focusing on FortiSIEM-specific controls and proactive monitoring.

Description

CVE-2023-34992 is a critical OS command injection vulnerability in Fortinet FortiSIEM versions 6.4.0 through 7.0.0. It allows unauthenticated remote attackers to execute arbitrary code or commands by sending specially crafted API requests. The vulnerability arises from improper neutralization of special elements in OS commands, enabling full compromise of affected systems. Exploitation requires no authentication or user interaction and can impact confidentiality, integrity, and availability. Although no known exploits are currently reported in the wild, the high CVSS score (9.6) indicates a severe risk.

References

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