CVE-2026-21743

HIGH 7.2CVE-2026-21743 · Published 10/02/2026 · updated 17/06/2026

In short

CVE-2026-21743 is a HIGH (CVSS 7.2) vulnerability affecting fortiauthenticator (fortinet).
Chance of exploitation in the next 30 days (EPSS): 0.38%, higher than 31.8% of all vulnerabilities.
Fix: update to 6.6.7 or later.

Package	Affected versions	Patched versions
fortiauthenticator fortinet	`≥ 6.3.0, < 6.6.7`	`6.6.7`

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.

References

fortiguard.fortinet.com/psirt/FG-IR-25-528 · Vendor Advisory

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Package

Affected versions

Patched versions

fortiauthenticator

fortinet

≥ 6.3.0, < 6.6.7

6.6.7

Description

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