Missing authorization in FortiAuthenticator - CVE-2026-21743
Published: February 10, 2026
Vulnerability identifier: #VU122533
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-21743
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to execute arbitrary code.
The vulnerability exists due to missing authorization on CSV user import. A read-only user can make modification to local users via a file upload to an unprotected endpoint.
Affected software
FortiAuthenticator
How to mitigate CVE-2026-21743
Install update from vendor's website.
FortiAuthenticator - update to 6.6.7