What is CVE-2000-0507?

CVE-2000-0507 is a vulnerability in Concatus Imate Webmail Server. Published 2000-06-01.

Is CVE-2000-0507 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Concatus Imate Webmail Server

CVE-2000-0507

Imate Webmail Server 2.5 allows remote attackers to cause a denial of service via a long HELO command.

Published 2000-06-01 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.073 (94.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.073 · newest: 0.073 · change: 0.000

Affected products

Concatus Imate Webmail Server — versions 2.5

Public proof-of-concept exploits

siegfried415/smtp-nel-filter

References

marc.info/ (mailing-list)
exchange.xforce.ibmcloud.com/vulnerabilities/4586 (vdb-entry)
www.securityfocus.com/bid/1286 (vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2000-0507?: CVE-2000-0507 is a vulnerability in Concatus Imate Webmail Server. Published 2000-06-01.
Is CVE-2000-0507 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.