CVE-2009-2530: Microsoft Internet Explorer

High severity, CVSS 9.3. EPSS: 22.9% chance of exploitation in the next 30 days.

Microsoft Internet Explorer 6, 6 SP1, 7, and 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, leading to memory corruption, aka "Uninitialized Memory Corruption Vulnerability," a different vulnerability than CVE-2009-2531.

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.