CVE-2021-41019

Name: CVE-2021-41019
Creator: NVD / NIST
Published: 2021-11-02T18:15:08.66+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.55%

Last modified Jun 17, 2026

CVE-2021-41019 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An improper validation of certificate with host mismatch [CWE-297] vulnerability in FortiOS versions 6.4.6 and below may allow the connection to a malicious LDAP server via options in GUI, leading to disclosure of sensitive information, such as AD credentials.. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

An improper validation of certificate with host mismatch [CWE-297] vulnerability in FortiOS versions 6.4.6 and below may allow the connection to a malicious LDAP server via options in GUI, leading to disclosure of sensitive information, such as AD credentials.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.55%

41.8th 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, <= 6.4.6

References

https://fortiguard.com/advisory/FG-IR-21-074Vendor Advisory
https://fortiguard.com/advisory/FG-IR-21-074Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-41019?

How severe is CVE-2021-41019?

CVE-2021-41019 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41019?

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-2021-41019?

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

Scan your code now

Source: NVD / NIST