Buffer overflow in MailCarrier 2.51 allows remote attackers to execute arbitrary code via a long (1) EHLO and possibly (2) HELO command.

published 2004-10-16 22 y ago modified 2026-06-16 4 mo ago also EUVD-2004-1632

cvss: 7.5; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 62.8%; EPSS 62.8% chance of exploitation in 30 days, percentile 99.2%
public exploits: 4; Metasploit, Exploit-DB

Timeline

2004-10-16 Published
2004-10-26 First public exploit (Metasploit exploit/windows/smtp/mailcarrier_smtp_ehlo)

Exploit prediction

62.76% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Metasploit exploit/windows/smtp/mailcarrier_smtp_ehlo TABS MailCarrier v2.51 SMTP EHLO Overflow metasploit exploit, good rank, 2004-10-26
EDB-16822 TABS MailCarrier 2.51 - SMTP EHLO Overflow (Metasploit) remote, 2010-04-30
EDB-637 TABS MailCarrier 2.51 - Remote Buffer Overflow remote, 2004-11-16
EDB-598 TABS MailCarrier 2.51 - SMTP 'EHLO' / 'HELO' Remote Buffer Overflow remote, 2004-10-26
securityfocus.com http://www.securityfocus.com/bid/11535 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

References

securityfocus.com /bid/11535
vdb-entry, exploit, vendor-advisory
secunia.com /advisories/12999
third-party-advisory, vendor-advisory
marc.info /?l=bugtraq&m=109880961630050&w=2
mailing-list
exchange.xforce.ibmcloud.com /vulnerabilities/17861
vdb-entry

Sources

CVE List CVE-2004-1638
NVD CVE-2004-1638

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary