CVE-2008-4258: Microsoft Internet Explorer

High severity, CVSS 8.5. EPSS: 17.8% chance of exploitation in the next 30 days.

Microsoft Internet Explorer 5.01 SP4 and 6 SP1 does not properly validate parameters during calls to navigation methods, which allows remote attackers to execute arbitrary code via a crafted HTML document that triggers memory corruption, aka "Parameter Validation Memory Corruption Vulnerability."

Affected products

• Microsoft Internet Explorer: version 5.01 only; version 6 only; version 7 only

Published 2008-12-10. Last modified 2026-06-16.