CVE-2004-2375

Buffer overflow in the POP3 server in 1st Class Mail Server 4.0 allows remote attackers to cause...

7.5 HighPublic exploit

Buffer overflow in the POP3 server in 1st Class Mail Server 4.0 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via an APOP USER command with a long second parameter (digest).

Exploit likelihood

5.86%Down 7.0 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

Record: CVE-2004-2375
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Updated: 2026-11-02

CVE List No score

Record: CVE-2004-2375
Updated: 2026-11-02

EUVDEUVD-2004-2367 No score

Record: EUVD-2004-2367
Updated: 2026-11-03

GitHub AdvisoriesGHSA-rhqm-2p68-x8qr No score

Buffer overflow in the POP3 server in 1st Class Mail Server 4.0 allows remote attackers to cause...

Record: GHSA-rhqm-2p68-x8qr
Updated: 2026-11-02

Affected products

1st class internet solutions class mail server

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	1st Class Internet Solutions 1st Class Mail Server 4.0 - Remote Buffer Overflow (PoC)	2004-03-02

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2004-2375 is a high vulnerability (CVSS 7.5) in 1st Class Internet Solutions Class Mail Server, published December 31, 2004. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 5.86%, the 93rd percentile. No source names a fixed version.