Vulnerability · Published Feb 10, 2026 · Assigned by fortinet
CVE-2026-21743
Medium 6.8
In plain English
A medium-severity missing authorization in FortiAuthenticator from Fortinet. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).
Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)0.4%top 68.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | FortiAuthenticator | 6.6.0 – through 6.6.66.5.0 – through 6.5.76.4.0 – through 6.4.116.3.0 – through 6.3.5 |
Weakness: CWE-862 · 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