CVE-2026-21743
Analyzed Analyzed - Analysis Complete
Missing Authorization in FortiAuthenticator Allows Unauthorized User Modification

Publication date: 2026-02-10

Last updated on: 2026-02-12

Assigner: Fortinet, Inc.

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.
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Meta Information
Published
2026-02-10
Last Modified
2026-02-12
Generated
2026-06-16
AI Q&A
2026-02-10
EPSS Evaluated
2026-06-14
NVD
CVE-2026-21743
EUVD
EUVD-2026-6220
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
fortinet fortiauthenticator From 6.3.0 (inc) to 6.6.7 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
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Executive Summary

This vulnerability is a missing authorization issue in Fortinet FortiAuthenticator versions 6.3 through 6.6.6. It allows a user with read-only permissions to bypass restrictions and modify local user accounts by uploading a file to an unprotected endpoint.

Impact Analysis

The vulnerability can lead to unauthorized modifications of local user accounts, potentially compromising the integrity and security of the authentication system. This could allow attackers or unauthorized users to escalate privileges or disrupt normal operations.

Compliance Impact

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Detection Guidance

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