CVE-2007-1731: Multiple stack-based buffer overflows in High Performance Anonymous FTP Server (hpaftpd) 1.01 allow remote att

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HIGH 10.0DOWNGRADE

CVE-2007-1731 is a high-severity flaw (CVSS 10.0) affecting hpaftpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple stack-based buffer overflows in High Performance Anonymous FTP Server (hpaftpd) 1.01 allow remote attackers to execute arbitrary code via long arguments to the (1) USER, (2) PASS, (3) CWD, (4) MKD, (5) RMD, (6) DELE, (7) RNFR, or (8) RNTO FTP command.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	4.8% (top 8%)
CISA exploited list	No
Published	2007-03-28
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: hpaftpd

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

Am I affected?

Timeline

2007-03-28 10:19 UTCPublished CVE record published
2026-06-16 22:38 UTCUpdated Record last modified

hpaftpd hpaftpd DOWNGRADE

Affected: 1.01

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.01

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.01 (Debian / Ubuntu)

apt-cache madison hpaftpd sudo apt install hpaftpd=<VERSION_BEFORE_1.01> sudo apt-mark hold hpaftpd

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

dnf --showduplicates list hpaftpd sudo dnf downgrade hpaftpd-<VERSION_BEFORE_1.01> sudo dnf versionlock add hpaftpd

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-2007-1731?

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

Is CVE-2007-1731 being exploited?

CVE-2007-1731 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-2007-1731 affect?

CVE-2007-1731 affects hpaftpd. Severity is high (CVSS 10.0). Multiple stack-based buffer overflows in High Performance Anonymous FTP Server (hpaftpd) 1.01 allow remote attackers to execute arbitrary code via long arguments to the (1) USER, (2) PASS, (3) CWD, (4) MKD, (5) RMD, (6) DELE, (7) RNFR, or (

How urgent is CVE-2007-1731?

Priority 58/100. Critical severity; EPSS top 8%: very likely to be exploited

References

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