Security Resilience

CVE-2023-34992

RCE in Fortinet Fortisiem 6.6.0 – 6.6.3

High EPSSRCECommand Injection
Published
10 October 2023
Modified
14 January 2026
Patch / advisory
View advisory
CVSS Score v3.1 10.0
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS Score 0.82 99.6th percentile
Risk Priority 100 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-34992 is a critical-severity OS Command Injection (CWE-78) vulnerability in Fortinet Fortisiem. Its CVSS base score is 10.0 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique NTDS (T1003.003); ranked in the top 0.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2023-34992 is an OS command injection vulnerability, tracked under CWE-78, that affects Fortinet products. The flaw stems from improper neutralization of special elements in OS commands and can be triggered through crafted API requests, enabling execution of unauthorized code or commands. It carries a maximum CVSS 3.1 score of 10.0 with a network attack vector, no required authentication or user interaction, and changed scope that yields full impacts on confidentiality, integrity, and availability.

An unauthenticated attacker with network access can send malicious API requests to exploit the injection and run arbitrary commands on the affected system, resulting in complete compromise of the target.

The referenced Fortinet advisory FG-IR-23-130 provides official guidance on the issue and associated remediation steps.

The EPSS score has reached a peak of 0.8189 with a current value of 0.7716, indicating substantial exploitation interest following disclosure.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet allows attacker to execute unauthorized code or commands via crafted API requests.

CWE(s)
CWE-78

Related Threats

MITRE ATT&CK Enterprise Techniques

T1003.003 NTDS Credential Access
Adversaries may attempt to access or create a copy of the Active Directory domain database in order to steal credential information, as well as obtain other information about domain members such as devices, users, and access rights.
attack.mitre.org →
T1007 System Service Discovery Discovery
Adversaries may try to gather information about registered local system services.
attack.mitre.org →
T1010 Application Window Discovery Discovery
Adversaries may attempt to get a listing of open application windows.
attack.mitre.org →
T1021.004 SSH Lateral Movement
Adversaries may use [Valid Accounts](https://attack.
attack.mitre.org →
T1021.008 Direct Cloud VM Connections Lateral Movement
Adversaries may leverage [Valid Accounts](https://attack.
attack.mitre.org →
T1027.001 Binary Padding Stealth
Adversaries may use binary padding to add junk data and change the on-disk representation of malware.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-25256Same product: Fortinet Fortisiem
CVE-2025-64155Same product: Fortinet Fortisiem
CVE-2023-36553Same product: Fortinet Fortisiem
CVE-2024-23109Same product: Fortinet Fortisiem
CVE-2024-23108Same product: Fortinet Fortisiem
CVE-2024-26012Same vendor: Fortinet
CVE-2023-25607Same vendor: Fortinet
CVE-2025-53679Same vendor: Fortinet
CVE-2025-47857Same vendor: Fortinet
CVE-2023-27999Same vendor: Fortinet

Affected Assets

fortinet
fortisiem
6.4.0, 6.4.1, 6.4.2, 6.5.0, 6.5.1 · 6.6.0 — 6.6.3 · 6.7.0 — 6.7.5

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.5
  • V1.2.8

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
blocks

PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.

PR.PS-02 partial match
blocks

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.8.10 Information deletion partial match
removes

References