CVE-2010-0027: Microsoft Internet Explorer

High severity, CVSS 9.3. EPSS: 34% chance of exploitation in the next 30 days.

The URL validation functionality in Microsoft Internet Explorer 5.01, 6, 6 SP1, 7 and 8, and the ShellExecute API function in Windows 2000 SP4, XP SP2 and SP3, and Server 2003 SP2, does not properly process input parameters, which allows remote attackers to execute arbitrary local programs via a crafted URL, aka "URL Validation Vulnerability."

Affected products

• Microsoft Internet Explorer: version 8 only; version 8.0.6001 only; version 7 only; version 7.0 only; version 7.0.5730 only; version 7.0.5730.11 only; …
• Microsoft Windows 2000: any version
• Microsoft Windows 2003 Server: any version
• Microsoft Windows 7: affected versions not specified
• Microsoft Windows Server 2003: any version
• Microsoft Windows Server 2008: any version
• Microsoft Windows Vista: any version
• Microsoft Windows XP: any version; affected versions not specified

Published 2010-01-22. Last modified 2026-06-16.