CVE-1999-0331: Microsoft Internet Explorer

High severity, CVSS 7.5. EPSS: 5% chance of exploitation in the next 30 days.

Buffer overflow in Internet Explorer 4.0(1).

Affected products

• Microsoft Internet Explorer: version 3.0.2 only; version 4.0 only; version 4.0.1 only

Published 1998-01-01. Last modified 2026-06-16.