CVE-2005-2767: Buffer overflow in LeapFTP allows remote attackers to execute arbitrary code via a long Host string in a Site

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HIGH 7.5DOWNGRADE

CVE-2005-2767 is a high-severity flaw (CVSS 7.5) affecting leapftp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in LeapFTP allows remote attackers to execute arbitrary code via a long Host string in a Site Queue (.lsq) file.

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	2005-09-02
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: leapware

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

Am I affected?

Timeline

2005-09-02 23:03 UTCPublished CVE record published
2026-06-16 22:15 UTCUpdated Record last modified

leapware leapftp DOWNGRADE

Affected: 2.7.3.600 · 2.7.4 · 2.7.4.602

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.7.3.600

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.7.3.600 (Debian / Ubuntu)

apt-cache madison leapftp sudo apt install leapftp=<VERSION_BEFORE_2.7.3.600> sudo apt-mark hold leapftp

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

dnf --showduplicates list leapftp sudo dnf downgrade leapftp-<VERSION_BEFORE_2.7.3.600> sudo dnf versionlock add leapftp

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: LeapFTP Client 2.7.3/2.7.4 - '.LSQ' File Remote Buffer Overflow (PoC)

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-2005-2767?

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

Is CVE-2005-2767 being exploited?

CVE-2005-2767 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-2005-2767 affect?

CVE-2005-2767 affects leapftp. Severity is high (CVSS 7.5). Buffer overflow in LeapFTP allows remote attackers to execute arbitrary code via a long Host string in a Site Queue (.lsq) file.

How urgent is CVE-2005-2767?

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

Related CVEs

CVE-2003-0558 HIGH 7.5 DOWNGRADE Buffer overflow in LeapFTP 2.7.3.600 allows remote FTP servers to execute arbitrary code via a long IP address

References

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