CVE-2021-26104

Name: CVE-2021-26104
Creator: NVD / NIST
Published: 2022-04-06T16:15:07.863+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 3.21%

Last modified Jun 17, 2026

CVE-2021-26104 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Multiple OS command injection (CWE-78) vulnerabilities in the command line interface of FortiManager 6.2.7 and below, 6.4.5 and below and all versions of 6.2.x, 6.0.x and 5.6.x, FortiAnalyzer 6.2.7 and below, 6.4.5 and below and all versions of 6.2.x, 6.0.x and 5.6.x, and FortiPortal 5.2.5 and below, 5.3.5 and below and 6.0.4 and below may allow a local authenticated and unprivileged user to execute arbitrary shell commands as root via specifically crafted CLI command parameters.. EPSS estimates a 3.21% chance of exploitation in the next 30 days.

Description

Multiple OS command injection (CWE-78) vulnerabilities in the command line interface of FortiManager 6.2.7 and below, 6.4.5 and below and all versions of 6.2.x, 6.0.x and 5.6.x, FortiAnalyzer 6.2.7 and below, 6.4.5 and below and all versions of 6.2.x, 6.0.x and 5.6.x, and FortiPortal 5.2.5 and below, 5.3.5 and below and 6.0.4 and below may allow a local authenticated and unprivileged user to execute arbitrary shell commands as root via specifically crafted CLI command parameters.

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

3.21%

86.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Fortinet	Fortianalyzer	>= 5.6.0, < 6.0.11
Fortinet	Fortianalyzer	>= 6.2.0, < 6.2.8
Fortinet	Fortianalyzer	>= 6.4.0, < 6.4.6
Fortinet	Fortimanager	>= 5.6.0, < 6.0.11
Fortinet	Fortimanager	>= 6.2.0, < 6.2.8
Fortinet	Fortimanager	>= 6.4.0, < 6.4.6
Fortinet	Fortiportal	< 5.2.6
Fortinet	Fortiportal	>= 5.3.0, < 5.3.6
Fortinet	Fortiportal	>= 6.0.0, < 6.0.5

References

https://fortiguard.com/advisory/FG-IR-21-037Vendor Advisory
https://github.com/orangecertcc/security-research/security/advisories/GHSA-f73m-fvj3-m2pmExploit, Third Party Advisory
https://fortiguard.com/advisory/FG-IR-21-037Vendor Advisory
https://github.com/orangecertcc/security-research/security/advisories/GHSA-f73m-fvj3-m2pmExploit, Third Party Advisory

Timeline

Published: Apr 6, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26104?

How severe is CVE-2021-26104?

CVE-2021-26104 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 3.21% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26104?

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-2021-26104?

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

Scan your code now

Source: NVD / NIST