SMTP service in (1) Microsoft Windows 2000 and (2) Internet Mail Connector (IMC) in Exchange Server 5.5 does not properly handle responses…

published 2002-03-08 24y ago modified 2026-06-16 4mo ago also EUVD-2002-0054

cvss: 7.5; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 22.4%; EPSS 22.4% chance of exploitation in 30 days, percentile 97%
public exploits: 0; none known

SMTP service in (1) Microsoft Windows 2000 and (2) Internet Mail Connector (IMC) in Exchange Server 5.5 does not properly handle responses to NTLM authentication, which allows remote attackers to perform mail relaying via an SMTP AUTH command using null session credentials.

Patch / fix

links 2

docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-011 advisory
securityfocus.com/bid/4205 advisory

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Exploit prediction

22.44% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-14).

CVSS scores

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

Classification

Weakness

CWE-294 Authentication Bypass by Capture-replay

Technology feeds

Microsoft Exchange rss critical rss

References

docs.microsoft.com /en-us/security-updates/securitybulletins/2002/ms02-011
vendor-advisory, patch
securityfocus.com /bid/4205
vdb-entry, patch, third-party-advisory
marc.info /?l=bugtraq&m=101501580409373&w=2
mailing-list, third-party-advisory

Sources

CVE List CVE-2002-0054
NVD CVE-2002-0054

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