What is CVE-2021-41638?

CVE-2021-41638 is a high-severity vulnerability in Melag FTP Server, classified under Improper Authentication. CVSS score: 7.5/10. Published 2022-06-24.

How severe is CVE-2021-41638?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Melag FTP Server

CVE-2021-41638

The authentication checks of the MELAG FTP Server in version 2.2.0.4 are incomplete, which allows a remote attacker to access local files only by using a valid username.

Vulnerability class: Broken Authentication

Published 2022-06-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.017 (76.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: +0.001

Affected products

Melag FTP Server — versions 2.2.0.4

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.securesystems.de/blog/advisory-and-exploitation-the-melag-ftp-server/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-41638?: CVE-2021-41638 is a high-severity vulnerability in Melag FTP Server, classified under Improper Authentication. CVSS score: 7.5/10. Published 2022-06-24.
How severe is CVE-2021-41638?: High severity. CVSS v3 base score is 7.5 out of 10.