CVE-2009-0753: Absolute path traversal vulnerability in MLDonkey 2.8.4 through 2.9.7 allows remote attackers to read arbitrar

This month

MEDIUM 5.0DOWNGRADE

CVE-2009-0753 is a medium-severity flaw (CVSS 5.0) affecting mldonkey. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Absolute path traversal vulnerability in MLDonkey 2.8.4 through 2.9.7 allows remote attackers to read arbitrary files via a leading "//" (double slash) in the filename.

Why this priority

EPSS top 7%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	5.8% (top 7%)
CISA exploited list	No
Weakness	CWE-22
Published	2009-03-03
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: mldonkey

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

Am I affected?

Timeline

2009-03-03 16:30 UTCPublished CVE record published
2026-06-16 23:05 UTCUpdated Record last modified

mldonkey mldonkey DOWNGRADE

Affected: 2.8.4 · 2.8.7 · 2.9 · 2.9.0-r3 · 2.9.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.8.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.8.4 (Debian / Ubuntu)

apt-cache madison mldonkey sudo apt install mldonkey=<VERSION_BEFORE_2.8.4> sudo apt-mark hold mldonkey

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

dnf --showduplicates list mldonkey sudo dnf downgrade mldonkey-<VERSION_BEFORE_2.8.4> sudo dnf versionlock add mldonkey

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: MLdonkey 2.9.7 - Arbitrary File Disclosure

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-2009-0753?

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

Is CVE-2009-0753 being exploited?

CVE-2009-0753 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-2009-0753 affect?

CVE-2009-0753 affects mldonkey. Severity is medium (CVSS 5.0). Absolute path traversal vulnerability in MLDonkey 2.8.4 through 2.9.7 allows remote attackers to read arbitrary files via a leading "//" (double slash) in the filename.

How urgent is CVE-2009-0753?

Priority 46/100. EPSS top 7%: very likely to be exploited; Public exploit reference

References

← Back to latest CVEs