CVE-2009-2529: Microsoft Internet Explorer

High severity, CVSS 8.1. EPSS: 19.5% chance of exploitation in the next 30 days.

Microsoft Internet Explorer 5.01 SP4, 6, 6 SP1, 7, and 8 does not properly handle argument validation for unspecified variables, which allows remote attackers to execute arbitrary code via a crafted HTML document, aka "HTML Component Handling Vulnerability."

Affected products

• Microsoft Internet Explorer: version 5.01 only; version 6 only; version 7 only; version 8 only
• Microsoft Windows 2000: any version
• Microsoft Windows 7: affected versions not specified
• Microsoft Windows Server 2003: any version
• Microsoft Windows Server 2008: any version; affected versions not specified
• Microsoft Windows Vista: any version; affected versions not specified
• Microsoft Windows XP: any version; affected versions not specified

Published 2009-10-14. Last modified 2026-06-16.