CVE-2004-1642: WFTPD Pro Server 3.21 allows remote authenticated users to cause a denial of service (crash) via a series of l

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MEDIUM 5.0DOWNGRADE

CVE-2004-1642 is a medium-severity flaw (CVSS 5.0) affecting wftpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WFTPD Pro Server 3.21 allows remote authenticated users to cause a denial of service (crash) via a series of long MLIST commands.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Published	2004-08-29
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: texas imperial software

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2004-08-29 04:00 UTCPublished CVE record published
2026-06-16 22:08 UTCUpdated Record last modified

texas imperial software wftpd DOWNGRADE

Affected: 3.21 · 3.21_r1 · 3.21_r2 · 3.21_r3

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.21

1. Check installed version

apt-cache policy wftpd || rpm -q wftpd || wftpd --version

2. No fixed release: DOWNGRADE to a release before 3.21 (Debian / Ubuntu)

apt-cache madison wftpd sudo apt install wftpd=<VERSION_BEFORE_3.21> sudo apt-mark hold wftpd

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

dnf --showduplicates list wftpd sudo dnf downgrade wftpd-<VERSION_BEFORE_3.21> sudo dnf versionlock add wftpd

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: WFTPD Pro Server 3.21 - MLST Remote Denial of Service

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-2004-1642?

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

Is CVE-2004-1642 being exploited?

CVE-2004-1642 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-2004-1642 affect?

CVE-2004-1642 affects wftpd. Severity is medium (CVSS 5.0). WFTPD Pro Server 3.21 allows remote authenticated users to cause a denial of service (crash) via a series of long MLIST commands.

How urgent is CVE-2004-1642?

Priority 44/100. Public exploit reference

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References

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