← Vulnerability feed

Vulnerability record · CVE-2026-21743 · published 10 February 2026

CVE-2026-21743: Fortinet fortiauthenticator missing authorization vulnerability

Fortinet · Fortiauthenticator

A missing authorization vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions may allow a read-only user to make modification to local users via a file upload to an unprotected endpoint.

7.2 CVSS 3.1 High EPSS 0.35% · top 74.1% CWE-862 · Missing authorization
7.2CVSS 3.1 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

A missing authorization vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions may allow a read-only user to make modification to local users via a file upload to an unprotected endpoint.

CVSS:3.1/AV:N/AC:L/PR:H/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.fortinet.com/psirt/FG-IR-25-528 Vendor Advisory

Track CVE-2026-21743 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%8.8CVE-2021-26116Fortinet fortiauthenticator os command injection vulnerabilityAn improper neutralization of special elements used in an OS command vulnerability in the command line interpreter of FortiAuthenticator before 6.3.1…EPSS 0.62%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%

Source: NIST National Vulnerability Database (record CVE-2026-21743), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.