CVE-2004-0501: Microsoft Outlook

Medium severity, CVSS 5.0. EPSS: 18.7% chance of exploitation in the next 30 days.

Outlook 2003 allows remote attackers to bypass intended access restrictions and cause Outlook to request a URL from a remote site via an HTML e-mail message containing a Vector Markup Language (VML) entity whose src parameter points to the remote site, which could allow remote attackers to know when a message has been read, verify valid e-mail addresses, and possibly leak other information.

Affected products

• Microsoft Outlook: version 2003 only

Published 2004-08-18. Last modified 2026-06-16.