CVE-2007-0099: Microsoft Internet Explorer

High severity, CVSS 9.3. EPSS: 25.7% chance of exploitation in the next 30 days.

Race condition in the msxml3 module in Microsoft XML Core Services 3.0, as used in Internet Explorer 6 and other applications, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via many nested tags in an XML document in an IFRAME, when synchronous document rendering is frequently disrupted with asynchronous events, as demonstrated using a JavaScript timer, which can trigger NULL pointer dereferences or memory corruption, aka "MSXML Memory Corruption Vulnerability."

Affected products

• Microsoft Internet Explorer: version 6 only
• Microsoft XML Core Services: version 3.0 only

Published 2007-01-08. Last modified 2026-06-16.