CVE-2026-21743 | BDVDB-2026-314795 Detail

FortinetFortiAuthenticator

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-862 Missing Authorization

References#

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

Exploit#

No public exploit known

History#

Version 12026-02-10Record published in the CVE List.
Version 22026-02-12Most recent update recorded in the CVE List.

Published

Published: 2026-02-10
Last modified: 2026-02-12

Vendor information

Vendor: Fortinet
Product: FortiAuthenticator

All Fortinet vulnerabilities

Score

6.8 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 31.5.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Missing Authorization

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 6.6.0 and <= 6.6.6
Fixed
Not stated
Vulnerable
>= 6.5.0 and <= 6.5.7
Fixed
Not stated
Vulnerable
>= 6.4.0 and <= 6.4.11
Fixed
Not stated
Vulnerable
>= 6.3.0 and <= 6.3.5
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

6.8 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).