CVE-2006-6240: Directory traversal vulnerability in Sorin Chitu Telnet-FTP Server 1.0 allows remote authenticated users to li

Routine

MEDIUM 4.0DOWNGRADE

CVE-2006-6240 is a medium-severity flaw (CVSS 4.0) affecting telnet ftp server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in Sorin Chitu Telnet-FTP Server 1.0 allows remote authenticated users to list contents of arbitrary directories and download arbitrary files via a .. (dot dot) sequence in an FTP command argument, as demonstrated by RETR (GET) or STOR (PUT). NOTE: The provenance of this information is unknown; the details are obtained solely from third party information.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.0 (Medium)
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Published	2006-12-03
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: telnet ftp server

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

Am I affected?

Timeline

2006-12-03 19:28 UTCPublished CVE record published
2026-06-16 22:32 UTCUpdated Record last modified

telnet ftp server telnet ftp server DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison telnet-ftp-server sudo apt install telnet-ftp-server=<VERSION_BEFORE_1.0> sudo apt-mark hold telnet-ftp-server

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

dnf --showduplicates list telnet-ftp-server sudo dnf downgrade telnet-ftp-server-<VERSION_BEFORE_1.0> sudo dnf versionlock add telnet-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.

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-2006-6240?

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

Is CVE-2006-6240 being exploited?

CVE-2006-6240 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-2006-6240 affect?

CVE-2006-6240 affects telnet ftp server. Severity is medium (CVSS 4.0). Directory traversal vulnerability in Sorin Chitu Telnet-FTP Server 1.0 allows remote authenticated users to list contents of arbitrary directories and download arbitrary files via a .. (dot dot) sequence in an FTP command argument, as demon

How urgent is CVE-2006-6240?

Priority 32/100. No elevated risk signals yet.

Related CVEs

CVE-2006-6241 MEDIUM 4.0 DOWNGRADE Sorin Chitu Telnet-FTP Server 1.0 allows remote authenticated users to cause a denial of service (crash) via c

References

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