CVE-2013-0020: Microsoft Internet Explorer

High severity, CVSS 9.3. EPSS: 28.3% chance of exploitation in the next 30 days.

Use-after-free vulnerability in Microsoft Internet Explorer 9 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka "Internet Explorer CMarkup Use After Free Vulnerability."

Affected products

• Microsoft Internet Explorer: version 9 only

Published 2013-02-13. Last modified 2026-06-16.