CVE-2007-2161: Microsoft Internet Explorer

Medium severity, CVSS 4.3. EPSS: 12.3% chance of exploitation in the next 30 days.

Microsoft Internet Explorer 7 allows remote attackers to cause a denial of service (browser hang) via JavaScript that matches a regular expression against a long string, as demonstrated using /(.)*/.

Affected products

• Microsoft Internet Explorer: version 7.0 only

Published 2007-04-22. Last modified 2026-06-16.