What is CVE-2021-43068?

CVE-2021-43068 is a medium-severity vulnerability in Fortinet Fortiauthenticator, classified under Improper Authentication. CVSS score: 5.4/10. Published 2021-12-09.

How severe is CVE-2021-43068?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Fortinet Fortiauthenticator

CVE-2021-43068

A improper authentication in Fortinet FortiAuthenticator version 6.4.0 allows user to bypass the second factor of authentication via a RADIUS login portal.

Vulnerability class: Broken Authentication

Published 2021-12-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.9th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Fortinet Fortiauthenticator — versions 6.4.0
Fortinet Fortiauthenticator — versions FortiAuthenticator 6.4.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

fortiguard.com/advisory/FG-IR-21-212 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-43068?: CVE-2021-43068 is a medium-severity vulnerability in Fortinet Fortiauthenticator, classified under Improper Authentication. CVSS score: 5.4/10. Published 2021-12-09.
How severe is CVE-2021-43068?: Medium severity. CVSS v3 base score is 5.4 out of 10.