CVE-1999-1521

NONECVSS 0.0Weaponized

0.0

Computalynx CMail 2.4 and CMail 2.3 SP2 SMTP servers are vulnerable to a buffer overflow attack in the MAIL FROM command that may allow a remote attacker to execute arbitrary code on the server.

CVSS v3: —
EG Score: —
EPSS: 95.7%
KEV: Not listed

Published

September 12, 1999

Last Modified

April 16, 2026

References (8)

cve@mitrehttp://marc.info/?l=bugtraq&m=93720402717560&w=2
cve@mitrehttp://marc.info/?l=bugtraq&m=94121824921783&w=2
cve@mitrehttp://www.securityfocus.com/bid/633
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/2240
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=93720402717560&w=2
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=94121824921783&w=2
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/633
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/2240

Data Freshness Timeline

(refreshed 10× in last 7d / 17× 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
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
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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
2026-05-20 22:36 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
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2026-05-18 21:29 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-19495✓ verified
First seen Sep 13, 1999
Computalynx CMail 2.3 SP2/2.4 - SMTP Buffer Overflow
Open source ↗

Frequently asked(4)

What is CVE-1999-1521?

CVE-1999-1521 is a none vulnerability published on September 12, 1999. Computalynx CMail 2.4 and CMail 2.3 SP2 SMTP servers are vulnerable to a buffer overflow attack in the MAIL FROM command that may allow a remote attacker to execute arbitrary code on the server.

When was CVE-1999-1521 disclosed?

CVE-1999-1521 was first published in the National Vulnerability Database on September 12, 1999, 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-1999-1521 actively exploited?

CVE-1999-1521 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-1521?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-1521, 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-1999-1521

📅 Published

🔄 Last Modified

🔗 References (8)