CVE-1999-0858: Microsoft Internet Explorer

Medium severity, CVSS 5.0. EPSS: 13.6% chance of exploitation in the next 30 days.

Internet Explorer 5 allows a remote attacker to modify the IE client's proxy configuration via a malicious Web Proxy Auto-Discovery (WPAD) server.

Affected products

• Microsoft Internet Explorer: version 5.0 only

Published 1999-12-02. Last modified 2026-06-16.