CVE-2004-2375

NONECVSS 0.0Weaponized

0.0

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).

CVSS v3: —
EG Score: —
EPSS: 95.6%
KEV: Not listed

Published

December 31, 2004

Last Modified

April 16, 2026

References (14)

cve@mitrehttp://secunia.com/advisories/11029
cve@mitrehttp://securitytracker.com/id?1009279
cve@mitrehttp://www.digiti.be/jeffosz/advisories/1stclasspop3.txt
cve@mitrehttp://www.osvdb.org/4129
cve@mitrehttp://www.securityfocus.com/bid/9794
cve@mitrehttp://www.zone-h.org/advisories/read/id=4047
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/15314
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/11029
af854a3a-2127-422b-91ae-364da2661108http://securitytracker.com/id?1009279
af854a3a-2127-422b-91ae-364da2661108http://www.digiti.be/jeffosz/advisories/1stclasspop3.txt
af854a3a-2127-422b-91ae-364da2661108http://www.osvdb.org/4129
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/9794
af854a3a-2127-422b-91ae-364da2661108http://www.zone-h.org/advisories/read/id=4047
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/15314

Data Freshness Timeline

(refreshed 10× in last 7d / 16× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
2026-05-29 13:40 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
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2026-05-27 13:37 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
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2026-05-24 16:42 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-21 22:38 UTCepss_batch
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2026-05-20 11:20 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-18 21:29 UTCepss_batch

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-23787✓ verified
First seen Mar 2, 2004
1st Class Internet Solutions 1st Class Mail Server 4.0 - Remote Buffer Overflow (PoC)
Open source ↗

Frequently asked(4)

What is CVE-2004-2375?

CVE-2004-2375 is a none vulnerability published on December 31, 2004. 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).

When was CVE-2004-2375 disclosed?

CVE-2004-2375 was first published in the National Vulnerability Database on December 31, 2004, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2004-2375 actively exploited?

CVE-2004-2375 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2004-2375?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2004-2375, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2004-2375

📅 Published

🔄 Last Modified

🔗 References (14)