CVE-2005-3640: Multiple buffer overflows in the IMAP Groupware Mail server of Floosietek FTGate (FTGate4) 4.1 allow remote at

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HIGH 10.0DOWNGRADE

CVE-2005-3640 is a high-severity flaw (CVSS 10.0) affecting ftgate. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple buffer overflows in the IMAP Groupware Mail server of Floosietek FTGate (FTGate4) 4.1 allow remote attackers to execute arbitrary code via long arguments to various IMAP commands, as demonstrated with the EXAMINE command.

Why this priority

Critical severity
EPSS top 5%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	8.8% (top 5%)
CISA exploited list	No
Weakness	CWE-119
Published	2005-11-16
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: floosietek

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

Am I affected?

Timeline

2005-11-16 21:22 UTCPublished CVE record published
2026-06-16 22:17 UTCUpdated Record last modified

floosietek ftgate DOWNGRADE

Affected: 4_4.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4_4.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4_4.1 (Debian / Ubuntu)

apt-cache madison ftgate sudo apt install ftgate=<VERSION_BEFORE_4_4.1> sudo apt-mark hold ftgate

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

dnf --showduplicates list ftgate sudo dnf downgrade ftgate-<VERSION_BEFORE_4_4.1> sudo dnf versionlock add ftgate

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: FTGate4 Groupware Mail Server 4.1 - imapd Remote Buffer Overflow (PoC)

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-2005-3640?

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

Is CVE-2005-3640 being exploited?

CVE-2005-3640 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-2005-3640 affect?

CVE-2005-3640 affects ftgate. Severity is high (CVSS 10.0). Multiple buffer overflows in the IMAP Groupware Mail server of Floosietek FTGate (FTGate4) 4.1 allow remote attackers to execute arbitrary code via long arguments to various IMAP commands, as demonstrated with the EXAMINE command.

How urgent is CVE-2005-3640?

Priority 64/100. Critical severity; EPSS top 5%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2000-1237 MEDIUM 5.0 MITIGATE The POP3 server in FTGate returns an -ERR code after receiving an invalid USER request, which makes it easier
CVE-2005-4569 HIGH 7.5 DOWNGRADE Stack-based buffer overflow in index.fts in FTGate Technology (formerly known as Floosietek) FTGate 4.4 (aka B
CVE-2005-4568 HIGH 7.5 DOWNGRADE Multiple format string vulnerabilities in FTGate Technology (formerly known as Floosietek) FTGate 4.4 (aka Bui
CVE-2005-4567 MEDIUM 5.8 DOWNGRADE Multiple cross-site scripting (XSS) vulnerabilities in FTGate Technology (formerly known as Floosietek) FTGate
CVE-1999-0887 MEDIUM 5.0 DOWNGRADE FTGate web interface server allows remote attackers to read files via a .

References

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