CVE-2021-26106

Name: CVE-2021-26106
Creator: NVD / NIST
Published: 2021-07-09T19:15:08.313+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2021-26106 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An improper neutralization of special elements used in an OS Command vulnerability in FortiAP's console 6.4.1 through 6.4.5 and 6.2.4 through 6.2.5 may allow an authenticated attacker to execute unauthorized commands by running the kdbg CLI command with specifically crafted arguments.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

An improper neutralization of special elements used in an OS Command vulnerability in FortiAP's console 6.4.1 through 6.4.5 and 6.2.4 through 6.2.5 may allow an authenticated attacker to execute unauthorized commands by running the kdbg CLI command with specifically crafted arguments.

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

0.29%

21.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Fortinet	Fortiap	>= 6.4.1, < 6.4.6
Fortinet	Fortiap-S	>= 6.2.4, < 6.2.6
Fortinet	Fortiap-W2	>= 6.2.4, < 6.2.6

References

https://fortiguard.com/advisory/FG-IR-20-210Vendor Advisory
https://fortiguard.com/advisory/FG-IR-20-210Vendor Advisory

Timeline

Published: Jul 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26106?

How severe is CVE-2021-26106?

CVE-2021-26106 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26106?

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-2021-26106?

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

Scan your code now

Source: NVD / NIST