CVE-2000-1237: The POP3 server in FTGate returns an -ERR code after receiving an invalid USER request, which makes it easier

Routine

MEDIUM 5.0MITIGATE

CVE-2000-1237 is a medium-severity flaw (CVSS 5.0) affecting ftgate. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The POP3 server in FTGate returns an -ERR code after receiving an invalid USER request, which makes it easier for remote attackers to determine valid usernames and conduct brute force password guessing.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Published	2000-12-31
Last modified	2026-09-23

Publisher (CNA): MITRE · Vendor: floosietek

Last updated 2026-09-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2000-12-31 05:00 UTCPublished CVE record published
2026-09-23 09:10 UTCUpdated Record last modified

floosietek ftgate MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

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

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2000-1237?

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

Is CVE-2000-1237 being exploited?

CVE-2000-1237 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-2000-1237 affect?

CVE-2000-1237 affects ftgate. Severity is medium (CVSS 5.0). The POP3 server in FTGate returns an -ERR code after receiving an invalid USER request, which makes it easier for remote attackers to determine valid usernames and conduct brute force password guessing.

How urgent is CVE-2000-1237?

Priority 35/100. No elevated risk signals yet.

Related CVEs

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-2005-3640 HIGH 10.0 DOWNGRADE Multiple buffer overflows in the IMAP Groupware Mail server of Floosietek FTGate (FTGate4) 4.1 allow remote at
CVE-1999-0887 MEDIUM 5.0 DOWNGRADE FTGate web interface server allows remote attackers to read files via a .

References

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