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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Fortinet FortiAuthenticator unaffected
Version Status Constraints
6.6.0 affected ≤ 6.6.6
6.5.0 affected ≤ 6.5.7
6.4.0 affected ≤ 6.4.11
6.3.0 affected ≤ 6.3.5

No data.

No data.

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Vendors Products
Fortinet Subscribe
Fortiauthenticator Subscribe

Project Subscriptions

Vendors Products
Fortinet Subscribe
Fortiauthenticator Subscribe
Advisories

No advisories yet.

Fixes

Solution

Upgrade to FortiAuthenticator version 8.0.0 or above Upgrade to FortiAuthenticator version 6.6.7 or above

Workaround

No workaround given by the vendor.

References
Link Providers
https://fortiguard.fortinet.com/psirt/FG-IR-25-528 cve-icon cve-icon
History

Tue, 10 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 10 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
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.
First Time appeared Fortinet
Fortinet fortiauthenticator
Weaknesses CWE-862
CPEs cpe:2.3:a:fortinet:fortiauthenticator:6.3.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.3.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.3.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.3.3:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.3.4:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.3.5:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.10:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.11:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.3:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.4:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.5:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.7:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.8:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.4.9:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.3:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.4:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.5:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.7:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.3:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.4:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.5:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.6:*:*:*:*:*:*:*
Vendors & Products Fortinet
Fortinet fortiauthenticator
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: fortinet

Published:

Updated: 2026-02-10T16:26:12.930Z

Reserved: 2026-01-05T14:17:53.224Z

Link: CVE-2026-21743

cve-icon Vulnrichment

Updated: 2026-02-10T16:26:10.477Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-10T16:16:10.903

Modified: 2026-02-10T21:51:48.077

Link: CVE-2026-21743

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-10T21:42:09Z

Weaknesses