← Vulnerability feed

Vulnerability record · CVE-2021-26116 · published 6 April 2022

CVE-2021-26116: Fortinet fortiauthenticator os command injection vulnerability

Fortinet · Fortiauthenticator

An improper neutralization of special elements used in an OS command vulnerability in the command line interpreter of FortiAuthenticator before 6.3.1 may allow an authenticated attacker to execute unauthorized commands via specifically crafted arguments to existing commands.

8.8 CVSS 3.1 High EPSS 0.62% · top 52.3% CWE-78 · OS command injection
8.8CVSS 3.1 base score, v2 6.5
0.62%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

An improper neutralization of special elements used in an OS command vulnerability in the command line interpreter of FortiAuthenticator before 6.3.1 may allow an authenticated attacker to execute unauthorized commands via specifically crafted arguments to existing commands.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://fortiguard.com/advisory/FG-IR-21-068 Vendor Advisory
https://fortiguard.com/advisory/FG-IR-21-068 Vendor Advisory

Track CVE-2021-26116 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-44277Fortinet fortiauthenticator improper access control vulnerabilityA improper access control vulnerability in Fortinet FortiAuthenticator 8.0.2, FortiAuthenticator 8.0.0, FortiAuthenticator 6.6.0 through 6.6.8, Forti…EPSS 0.48%9.0CVE-2013-6990Fortinet fortiauthenticator permissions and access controls vulnerabilityFortiGuard FortiAuthenticator before 3.0 allows remote administrators to gain privileges via the command line interface.EPSS 1.1%8.1CVE-2021-43068Fortinet fortiauthenticator improper authentication vulnerabilityA improper authentication in Fortinet FortiAuthenticator version 6.4.0 allows user to bypass the second factor of authentication via a RADIUS login p…EPSS 0.57%7.5CVE-2025-53379Fortinet fortiauthenticator out-of-bounds read vulnerabilityA out-of-bounds read vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.2, FortiAuthenticator 6.5 all versions may allow a remote unauthe…EPSS 0.53%7.5CVE-2021-22124Fortinet fortiauthenticator uncontrolled resource consumption vulnerabilityAn uncontrolled resource consumption (denial of service) vulnerability in the login modules of FortiSandbox 3.2.0 through 3.2.2, 3.1.0 through 3.1.4,…EPSS 1.0%7.5CVE-2021-24005Fortinet fortiauthenticator hard-coded credentials vulnerabilityUsage of hard-coded cryptographic keys to encrypt configuration files and debug logs in FortiAuthenticator versions before 6.3.0 may allow an attacke…EPSS 0.56%7.5CVE-2015-1455Fortinet fortiauthenticator vulnerabilityFortinet FortiAuthenticator 3.0.0 has a password of (1) slony for the slony PostgreSQL user and (2) www-data for the www-data PostgreSQL user, which …EPSS 2.7%7.2CVE-2026-21743Fortinet fortiauthenticator missing authorization vulnerabilityA missing authorization vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4…EPSS 0.35%

Source: NIST National Vulnerability Database (record CVE-2021-26116), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.