CVE-2021-24012

Name: CVE-2021-24012
Creator: NVD / NIST
Published: 2021-06-02T13:15:12.673+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.3/10EPSS 0.48%

Last modified Jun 17, 2026

CVE-2021-24012 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. An improper following of a certificate's chain of trust vulnerability in FortiGate versions 6.4.0 to 6.4.4 may allow an LDAP user to connect to SSLVPN with any certificate that is signed by a trusted Certificate Authority.. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

Description

An improper following of a certificate's chain of trust vulnerability in FortiGate versions 6.4.0 to 6.4.4 may allow an LDAP user to connect to SSLVPN with any certificate that is signed by a trusted Certificate Authority.

Metrics

CVSS 3.1

7.3/10

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

EPSS Probability

0.48%

37.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Fortinet	Fortios	>= 6.4.0, < 6.4.5

References

https://fortiguard.com/advisory/FG-IR-21-018Vendor Advisory
https://fortiguard.com/advisory/FG-IR-21-018Vendor Advisory

Timeline

Published: Jun 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24012?

How severe is CVE-2021-24012?

CVE-2021-24012 has a CVSS score of 7.3/10 (HIGH severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24012?

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-2021-24012?

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

Scan your code now

Source: NVD / NIST