What is CVE-2000-0042?

CVE-2000-0042 is a vulnerability in Csm Mail Server. Published 1999-12-29.

Is CVE-2000-0042 known to be exploited?

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

Vulnerability in Csm Mail Server

CVE-2000-0042

Buffer overflow in CSM mail server allows remote attackers to cause a denial of service or execute commands via a long HELO command.

Published 1999-12-29 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 10.0 (High). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.030 (86.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000

Affected products

Csm Mail Server — versions 1999-07b, 1999-07f, 1999-07g

Public proof-of-concept exploits

siegfried415/smtp-nel-filter

References

www.securityfocus.com/bid/895 (vdb-entry)

Frequently asked questions

What is CVE-2000-0042?: CVE-2000-0042 is a vulnerability in Csm Mail Server. Published 1999-12-29.
Is CVE-2000-0042 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.