CVE-2004-2037: Buffer overflow in Mollensoft Lightweight FTP Server 3.6 allows remote authenticated users to cause a denial o

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HIGH 7.5DOWNGRADE

CVE-2004-2037 is a high-severity flaw (CVSS 7.5) affecting lightweight ftp server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Mollensoft Lightweight FTP Server 3.6 allows remote authenticated users to cause a denial of service (crash) and possibly execute arbitrary code via a long CWD command, as demonstrated in one example by using the "cd" command in an interactive FTP client.

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	6.9% (top 6%)
CISA exploited list	No
Published	2004-03-24
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: mollensoft software

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

Am I affected?

Timeline

2004-03-24 05:00 UTCPublished CVE record published
2026-06-16 22:08 UTCUpdated Record last modified

mollensoft software lightweight ftp server DOWNGRADE

Affected: 3.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.6 (Debian / Ubuntu)

apt-cache madison lightweight-ftp-server sudo apt install lightweight-ftp-server=<VERSION_BEFORE_3.6> sudo apt-mark hold lightweight-ftp-server

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

dnf --showduplicates list lightweight-ftp-server sudo dnf downgrade lightweight-ftp-server-<VERSION_BEFORE_3.6> sudo dnf versionlock add lightweight-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.

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: Mollensoft Lightweight FTP Server 3.6 - 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-2004-2037?

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

Is CVE-2004-2037 being exploited?

CVE-2004-2037 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-2004-2037 affect?

CVE-2004-2037 affects lightweight ftp server. Severity is high (CVSS 7.5). Buffer overflow in Mollensoft Lightweight FTP Server 3.6 allows remote authenticated users to cause a denial of service (crash) and possibly execute arbitrary code via a long CWD command, as demonstrated in one example by using the "cd" com

How urgent is CVE-2004-2037?

Priority 55/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

References

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