CVE-2021-24023

Name: CVE-2021-24023
Creator: NVD / NIST
Published: 2021-06-03T15:15:07.633+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.75%

Last modified Jun 17, 2026

CVE-2021-24023 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. An improper input validation in FortiAI v1.4.0 and earlier may allow an authenticated user to gain system shell access via a malicious payload in the "diagnose" command.. EPSS estimates a 0.75% chance of exploitation in the next 30 days.

Description

An improper input validation in FortiAI v1.4.0 and earlier may allow an authenticated user to gain system shell access via a malicious payload in the "diagnose" command.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.75%

50.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Fortinet	Fortiai Firmware	<= 1.4.0

References

https://fortiguard.com/advisory/FG-IR-21-033Vendor Advisory
https://fortiguard.com/advisory/FG-IR-21-033Vendor Advisory

Timeline

Published: Jun 3, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24023?

An improper input validation in FortiAI v1.4.0 and earlier may allow an authenticated user to gain system shell access via a malicious payload in the "diagnose" command.

How severe is CVE-2021-24023?

CVE-2021-24023 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.75% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24023?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24023?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST