Description
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.
Scores
EPSS
0.1254
EPSS Percentile
94.0%
Details
CWE
CWE-294
Status
published
Products (2)
microsoft/exchange_server
5.5 (5 CPE variants)
microsoft/windows_2000
(3 CPE variants)
Published
Mar 08, 2002
Tracked Since
Feb 18, 2026