CVE-2007-2639: Directory traversal vulnerability in TFTPdWin 0.4.2 allows remote attackers to read or modify arbitrary files

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HIGH 10.0DOWNGRADE

CVE-2007-2639 is a high-severity flaw (CVSS 10.0) affecting tftp server tftpdwin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in TFTPdWin 0.4.2 allows remote attackers to read or modify arbitrary files outside the TFTP root via unspecified vectors.

Why this priority

Critical severity
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	3.6% (top 10%)
CISA exploited list	No
Published	2007-05-13
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: prosysinfo

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

Am I affected?

Timeline

2007-05-13 23:19 UTCPublished CVE record published
2026-06-16 22:40 UTCUpdated Record last modified

prosysinfo tftp server tftpdwin DOWNGRADE

Affected: 0.4.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.4.2

1. Check installed version

apt-cache policy tftp-server-tftpdwin || rpm -q tftp-server-tftpdwin || tftp-server-tftpdwin --version

2. No fixed release: DOWNGRADE to a release before 0.4.2 (Debian / Ubuntu)

apt-cache madison tftp-server-tftpdwin sudo apt install tftp-server-tftpdwin=<VERSION_BEFORE_0.4.2> sudo apt-mark hold tftp-server-tftpdwin

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

dnf --showduplicates list tftp-server-tftpdwin sudo dnf downgrade tftp-server-tftpdwin-<VERSION_BEFORE_0.4.2> sudo dnf versionlock add tftp-server-tftpdwin

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: TFTP Server TFTPDWin 0.4.2 - Directory Traversal

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-2007-2639?

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

Is CVE-2007-2639 being exploited?

CVE-2007-2639 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-2007-2639 affect?

CVE-2007-2639 affects tftp server tftpdwin. Severity is high (CVSS 10.0). Directory traversal vulnerability in TFTPdWin 0.4.2 allows remote attackers to read or modify arbitrary files outside the TFTP root via unspecified vectors.

How urgent is CVE-2007-2639?

Priority 62/100. Critical severity; Public exploit reference

Related CVEs

CVE-2007-1404 HIGH 7.3 DOWNGRADE tftpd.exe in ProSysInfo TFTP Server TFTPDWIN 0.4.2 allows remote attackers to cause a denial of service via a
CVE-2006-4948 HIGH 7.5 UPGRADE Stack-based buffer overflow in tftpd.exe in ProSysInfo TFTP Server TFTPDWIN 0.4.2 and earlier allows remote at

References

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