What is CVE-2023-34992?

CVE-2023-34992 is a critical-severity vulnerability in Fortinet Fortisiem, classified under OS Command Injection. CVSS score: 10.0/10. Published 2023-10-10.

How severe is CVE-2023-34992?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2023-34992 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Fortinet Fortisiem

CVE-2023-34992

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.

Vulnerability class: Command Injection (OS Command Injection)

Published 2023-10-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.817 (99.6th percentile), scored 2026-10-18.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.801 · newest: 0.817 · change: +0.016

Affected products

Fortinet Fortisiem — versions 6.4.0, 6.5.0, 6.4.1

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

References

fortiguard.com/psirt/FG-IR-23-130 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-34992?: CVE-2023-34992 is a critical-severity vulnerability in Fortinet Fortisiem, classified under OS Command Injection. CVSS score: 10.0/10. Published 2023-10-10.
How severe is CVE-2023-34992?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2023-34992 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.