CVE-1999-0031: Microsoft Internet Explorer

Low severity, CVSS 2.6. EPSS: 18.3% chance of exploitation in the next 30 days.

JavaScript in Internet Explorer 3.x and 4.x, and Netscape 2.x, 3.x and 4.x, allows remote attackers to monitor a user's web activities, aka the Bell Labs vulnerability.

Affected products

• Microsoft Internet Explorer: version 3.0 only; version 4.0 only
• Netscape Communicator: version 2.0 only; version 3.0 only; version 4.0 only

Published 1997-07-08. Last modified 2026-06-16.