CVE-2000-0645: WFTPD and WFTPD Pro 2.41 allows remote attackers to cause a denial of service by using the RESTART (REST) comm

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MEDIUM 6.4DOWNGRADE

CVE-2000-0645 is a medium-severity flaw (CVSS 6.4) affecting wftpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WFTPD and WFTPD Pro 2.41 allows remote attackers to cause a denial of service by using the RESTART (REST) command and writing beyond the end of a file, or writing to a file that does not exist, via commands such as STORE UNIQUE (STOU), STORE (STOR), or APPEND (APPE).

Why this priority

EPSS top 8%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	6.4 (Medium)
EPSS exploit chance	4.9% (top 8%)
CISA exploited list	No
Published	2000-07-21
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

2000-07-21 04:00 UTCPublished CVE record published
2026-06-16 21:52 UTCUpdated Record last modified

texas imperial software wftpd DOWNGRADE

Affected: 2.4.1 · 2.4.1_rc11 · 2.34 · 2.40

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.4.1 (Debian / Ubuntu)

apt-cache madison wftpd sudo apt install wftpd=<VERSION_BEFORE_2.4.1> sudo apt-mark hold wftpd

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

dnf --showduplicates list wftpd sudo dnf downgrade wftpd-<VERSION_BEFORE_2.4.1> 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 2.4.1RC11 - 'REST' Malformed File Write 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-2000-0645?

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

Is CVE-2000-0645 being exploited?

CVE-2000-0645 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-2000-0645 affect?

CVE-2000-0645 affects wftpd. Severity is medium (CVSS 6.4). WFTPD and WFTPD Pro 2.41 allows remote attackers to cause a denial of service by using the RESTART (REST) command and writing beyond the end of a file, or writing to a file that does not exist, via commands such as STORE UNIQUE (STOU), STOR

How urgent is CVE-2000-0645?

Priority 50/100. EPSS top 8%: very likely to be exploited; Public exploit reference

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References

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