What is CVE-2021-41020?

CVE-2021-41020 is a high-severity vulnerability in Fortinet Fortiisolator. CVSS score: 8.8/10. Published 2022-05-04.

How severe is CVE-2021-41020?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Fortinet Fortiisolator

CVE-2021-41020

An improper access control vulnerability [CWE-284] in FortiIsolator versions 2.3.2 and below may allow an authenticated, non privileged attacker to regenerate the CA certificate via the regeneration URL.

Published 2022-05-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (46.9th percentile), scored 2026-09-29.

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 Fortiisolator
Fortinet Fortiisolator — versions FortiIsolator 2.3.2, 2.3.1, 2.3.0

References

fortiguard.com/psirt/FG-IR-21-040 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-41020?: CVE-2021-41020 is a high-severity vulnerability in Fortinet Fortiisolator. CVSS score: 8.8/10. Published 2022-05-04.
How severe is CVE-2021-41020?: High severity. CVSS v3 base score is 8.8 out of 10.