What is CVE-2021-41639?

CVE-2021-41639 is a medium-severity vulnerability in Melag FTP Server, classified under Cleartext Storage of Sensitive Information. CVSS score: 5.5/10. Published 2022-06-24.

How severe is CVE-2021-41639?

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

Vulnerability in Melag FTP Server

CVE-2021-41639

MELAG FTP Server 2.2.0.4 stores unencrpyted passwords of FTP users in a local configuration file.

Published 2022-06-24 · 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 (11.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.8% 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

Melag FTP Server — versions 2.2.0.4

Weakness classification (CWE)

CWE-312 — Cleartext Storage of Sensitive Information

References

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

Frequently asked questions

What is CVE-2021-41639?: CVE-2021-41639 is a medium-severity vulnerability in Melag FTP Server, classified under Cleartext Storage of Sensitive Information. CVSS score: 5.5/10. Published 2022-06-24.
How severe is CVE-2021-41639?: Medium severity. CVSS v3 base score is 5.5 out of 10.