CVE-2003-0904: Microsoft Exchange Server

Medium severity, CVSS 6.0. EPSS: 8.2% chance of exploitation in the next 30 days.

Microsoft Exchange 2003 and Outlook Web Access (OWA), when configured to use NTLM authentication, does not properly reuse HTTP connections, which can cause OWA users to view mailboxes of other users when Kerberos has been disabled as an authentication method for IIS 6.0, e.g. when SharePoint Services 2.0 is installed.

Affected products

• Microsoft Exchange Server: version 2003 only
• Microsoft SharePoint Services: version 2.0 only
• Microsoft Windows Server 2003: any version; affected versions not specified; version r2 only

Published 2004-01-20. Last modified 2026-06-16.