CVE-2001-0770: Buffer overflow in GuildFTPd Server 0.97 allows remote attacker to execute arbitrary code via a long SITE comm

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HIGH 7.5DOWNGRADE

CVE-2001-0770 is a high-severity flaw (CVSS 7.5) affecting guildftpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in GuildFTPd Server 0.97 allows remote attacker to execute arbitrary code via a long SITE command.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Published	2001-10-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: steve poulsen

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

Am I affected?

Timeline

2001-10-18 04:00 UTCPublished CVE record published
2026-06-16 21:54 UTCUpdated Record last modified

steve poulsen guildftpd DOWNGRADE

Affected: 0.97

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.97

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.97 (Debian / Ubuntu)

apt-cache madison guildftpd sudo apt install guildftpd=<VERSION_BEFORE_0.97> sudo apt-mark hold guildftpd

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

dnf --showduplicates list guildftpd sudo dnf downgrade guildftpd-<VERSION_BEFORE_0.97> sudo dnf versionlock add guildftpd

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-2001-0770?

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

Is CVE-2001-0770 being exploited?

CVE-2001-0770 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-2001-0770 affect?

CVE-2001-0770 affects guildftpd. Severity is high (CVSS 7.5). Buffer overflow in GuildFTPd Server 0.97 allows remote attacker to execute arbitrary code via a long SITE command.

How urgent is CVE-2001-0770?

Priority 48/100. High severity

Related CVEs

CVE-2008-4572 HIGH 10.0 DOWNGRADE GuildFTPd 0.999.14, and possibly other versions, allows remote attackers to cause a denial of service (crash)
CVE-2006-5133 HIGH 7.5 DOWNGRADE Buffer overflow in GuildFTPd 0.999.13 allows remote attackers to have an unknown impact, possibly code executi
CVE-2003-1267 MEDIUM 5.0 DOWNGRADE GuildFTPd 0.999 allows remote attackers to cause a denial of service (crash) via a GET request for MS-DOS devi
CVE-2001-0769 MEDIUM 5.0 DOWNGRADE Memory leak in GuildFTPd Server 0.97 allows remote attackers to cause a denial of service via a request contai
CVE-2001-0768 MEDIUM 4.6 DOWNGRADE GuildFTPd 0.9.7 stores user names and passwords in plaintext in the default.usr file, which allows local users

References

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