CVE-2021-41639: MELAG FTP Server 2.2.0.4 stores unencrpyted passwords of FTP users in a local configuration file.

Routine

MEDIUM 5.5DOWNGRADE

CVE-2021-41639 is a medium-severity flaw (CVSS 5.5) affecting ftp server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-312
Published	2022-06-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: melag

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-06-24 12:15 UTCPublished CVE record published
2026-06-17 04:08 UTCUpdated Record last modified

melag ftp server DOWNGRADE

Affected: 2.2.0.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2.0.4

1. Check installed version

apt-cache policy ftp-server || rpm -q ftp-server || ftp-server --version

2. No fixed release: DOWNGRADE to a release before 2.2.0.4 (Debian / Ubuntu)

apt-cache madison ftp-server sudo apt install ftp-server=<VERSION_BEFORE_2.2.0.4> sudo apt-mark hold ftp-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ftp-server sudo dnf downgrade ftp-server-<VERSION_BEFORE_2.2.0.4> sudo dnf versionlock add ftp-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-41639?

ftp server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-41639 being exploited?

CVE-2021-41639 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-41639 affect?

CVE-2021-41639 affects ftp server. Severity is medium (CVSS 5.5). MELAG FTP Server 2.2.0.4 stores unencrpyted passwords of FTP users in a local configuration file.

How urgent is CVE-2021-41639?

Priority 28/100. Public exploit reference

Related CVEs

CVE-2026-6265 HIGH 8.8 UPGRADE Insecure preserved inherited permissions vulnerability in Cerberus FTP Server on Windows allows Privilege Esca
CVE-2025-5331 HIGH 7.3 DOWNGRADE A vulnerability has been found in PCMan FTP Server 2.0.7 and classified as critical
CVE-2025-5635 HIGH 7.3 DOWNGRADE A vulnerability classified as critical was found in PCMan FTP Server 2.0.7
CVE-2024-0731 MEDIUM 5.3 DOWNGRADE A vulnerability has been found in PCMan FTP Server 2.0.7 and classified as problematic
CVE-2024-0732 MEDIUM 5.3 DOWNGRADE A vulnerability was found in PCMan FTP Server 2.0.7 and classified as problematic

References

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