CVE-2026-21743

⚠️ high

Summary

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 Score

7.2

High

EPSS Score

0.0

Exploit Probability

Published Date

2026-02-10

First Seen: 2026-02-11

📊 Relative Risk Intelligence

This CVE is Moderate Risk - more severe than 55.5% of all 326,604 vulnerabilities in our database.

#145,309

Above average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Feb 10, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Total

Complete system compromise possible

SSVC data provided by CISA

Last Modified 2026-02-12

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-862

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
fortinet	fortiauthenticator	Affected	> 6.3.0 < 6.6.7

🔗 References 1

https://fortiguard.fortinet.com/psirt/FG-IR-25-528

Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-44277	⛔ critical	9.8	0.1	A improper access control vulnerability in Fortinet FortiAuthenticator 8.0.2, FortiAuthenticator 8.0.0, FortiAuthenticat...	2026-05-12
CVE-2025-57823	ℹ️ low	2.7	0.0	A direct request ('forced browsing') vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticato...	2025-12-09
CVE-2025-59923	ℹ️ low	2.7	0.0	An improper access control vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all ...	2025-12-09
CVE-2022-23439	🔶 medium	4.7	0.1	A externally controlled reference to a resource in another sphere vulnerability in Fortinet allows attacker to poison w...	2025-01-22
CVE-2024-23664	🔶 medium	6.1	0.3	A URL redirection to untrusted site ('open redirect') in Fortinet FortiAuthenticator version 6.6.0, version 6.5.3 and be...	2024-06-03
CVE-2022-22302	🔶 medium	5.3	0.1	A clear text storage of sensitive information (CWE-312) vulnerability in both FortiGate version 6.4.0 through 6.4.1, 6.2...	2023-07-11

These CVEs affect the same products