CVE-2009-0553: Microsoft Internet Explorer

High severity, CVSS 9.3. EPSS: 41.4% chance of exploitation in the next 30 days.

Microsoft Internet Explorer 6 SP1, 6 and 7 on Windows XP SP2 and SP3, 6 and 7 on Windows Server 2003 SP1 and SP2, 7 on Windows Vista Gold and SP1, and 7 on Windows Server 2008 allows remote attackers to execute arbitrary code via a web page that triggers presence of an object in memory that was (1) not properly initialized or (2) deleted, aka "Uninitialized Memory Corruption Vulnerability."

Affected products

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

Published 2009-04-15. Last modified 2026-06-16.