CVE-2021-43066

Name: CVE-2021-43066
Creator: NVD / NIST
Published: 2022-05-11T16:15:08.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.21%

Last modified Jun 17, 2026

CVE-2021-43066 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A external control of file name or path in Fortinet FortiClientWindows version 7.0.2 and below, version 6.4.6 and below, version 6.2.9 and below, version 6.0.10 and below allows attacker to escalate privilege via the MSI installer.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

A external control of file name or path in Fortinet FortiClientWindows version 7.0.2 and below, version 6.4.6 and below, version 6.2.9 and below, version 6.0.10 and below allows attacker to escalate privilege via the MSI installer.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.21%

11.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-668

Affected Software

Vendor	Product	Versions
Fortinet	Forticlient	>= 6.0.0, < 6.4.7
Fortinet	Forticlient	>= 7.0.0, < 7.0.3

References

https://fortiguard.com/advisory/FG-IR-21-154Vendor Advisory
https://fortiguard.com/advisory/FG-IR-21-154Vendor Advisory

Timeline

Published: May 11, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43066?

How severe is CVE-2021-43066?

CVE-2021-43066 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43066?

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-2021-43066?

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

Scan your code now

Source: NVD / NIST