CVE-1999-1447: Microsoft Internet Explorer

Medium severity, CVSS 5.0. EPSS: 13.3% chance of exploitation in the next 30 days.

Internet Explorer 4.0 allows remote attackers to cause a denial of service (crash) via HTML code that contains a long CLASSID parameter in an OBJECT tag.

Affected products

• Microsoft Internet Explorer: version 4.0 only

Published 1998-07-28. Last modified 2026-06-16.