What is CVE-2021-41023?

CVE-2021-41023 is a medium-severity vulnerability in Fortinet Fortisiemwindowsagent, classified under Insufficiently Protected Credentials. CVSS score: 5.5/10. Published 2021-11-02.

How severe is CVE-2021-41023?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Fortinet Fortisiemwindowsagent

CVE-2021-41023

A unprotected storage of credentials in Fortinet FortiSIEM Windows Agent version 4.1.4 and below allows an authenticated user to disclosure agent password due to plaintext credential storage in log files

Published 2021-11-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (11.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Fortinet Fortisiemwindowsagent — versions FortiSIEMWindowsAgent 4.1.4, 4.1.3, 4.1.2, 4.1.1, 4.1.0, 4.0.0, 3.3.0, 3.2.2, 3.2.1, 3.2.0, 3.1.2, 3.1.0
Fortinet Fortisiem
Microsoft Windows

Weakness classification (CWE)

CWE-522 — Insufficiently Protected Credentials

References

fortiguard.com/advisory/FG-IR-21-175 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-41023?: CVE-2021-41023 is a medium-severity vulnerability in Fortinet Fortisiemwindowsagent, classified under Insufficiently Protected Credentials. CVSS score: 5.5/10. Published 2021-11-02.
How severe is CVE-2021-41023?: Medium severity. CVSS v3 base score is 5.5 out of 10.