CVE-2006-2172: Buffer overflow in Gene6 FTP Server 3.1.0 allows remote authenticated attackers to cause a denial of service (

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HIGH 7.5DOWNGRADE

CVE-2006-2172 is a high-severity flaw (CVSS 7.5) affecting g6 ftp server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Gene6 FTP Server 3.1.0 allows remote authenticated attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long argument to (1) MKD or (2) XMKD, as demonstrated by the Infigo FTPStress Fuzzer.

Why this priority

High severity
EPSS top 9%: 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	4.3% (top 9%)
CISA exploited list	No
Published	2006-05-04
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: gene6

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

Am I affected?

Timeline

2006-05-04 12:38 UTCPublished CVE record published
2026-06-16 22:24 UTCUpdated Record last modified

gene6 g6 ftp server DOWNGRADE

Affected: 3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1

1. Check installed version

apt-cache policy g6-ftp-server || rpm -q g6-ftp-server || g6-ftp-server --version

2. No fixed release: DOWNGRADE to a release before 3.1 (Debian / Ubuntu)

apt-cache madison g6-ftp-server sudo apt install g6-ftp-server=<VERSION_BEFORE_3.1> sudo apt-mark hold g6-ftp-server

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

dnf --showduplicates list g6-ftp-server sudo dnf downgrade g6-ftp-server-<VERSION_BEFORE_3.1> sudo dnf versionlock add g6-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-2006-2172?

g6 ftp server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-2172 being exploited?

CVE-2006-2172 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-2006-2172 affect?

CVE-2006-2172 affects g6 ftp server. Severity is high (CVSS 7.5). Buffer overflow in Gene6 FTP Server 3.1.0 allows remote authenticated attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long argument to (1) MKD or (2) XMKD, as demonstrated by the Infigo FTPStress Fuz

How urgent is CVE-2006-2172?

Priority 54/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2005-0690 LOW 2.1 DOWNGRADE Gene6 FTP Server does not properly restrict access to the control console, which allows local users to modify
CVE-2001-0264 MEDIUM 5.0 DOWNGRADE Gene6 G6 FTP Server 2.0 (aka BPFTP Server 2.10) allows remote attackers to obtain NETBIOS credentials by reque
CVE-2001-0263 HIGH 7.5 DOWNGRADE Gene6 G6 FTP Server 2.0 (aka BPFTP Server 2.10) allows attackers to read file attributes outside of the web ro

References

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