What is CVE-2021-24017?

CVE-2021-24017 is a medium-severity vulnerability in Fortinet Fortimanager, classified under Improper Authentication. CVSS score: 5.4/10. Published 2021-09-30.

How severe is CVE-2021-24017?

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

Auth bypass in Fortinet Fortimanager

CVE-2021-24017

An improper authentication in Fortinet FortiManager version 6.4.3 and below, 6.2.6 and below allows attacker to assign arbitrary Policy and Object modules via crafted requests to the request handler.

Vulnerability class: Broken Authentication

Published 2021-09-30 · 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:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.006 (44.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.0% 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 Fortimanager
Fortinet Fortimanager — versions FortiManager 6.4.3, 6.2.6

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

fortiguard.com/advisory/FG-IR-20-189 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-24017?: CVE-2021-24017 is a medium-severity vulnerability in Fortinet Fortimanager, classified under Improper Authentication. CVSS score: 5.4/10. Published 2021-09-30.
How severe is CVE-2021-24017?: Medium severity. CVSS v3 base score is 5.4 out of 10.