CVE-2001-0877: Microsoft Windows 98

Medium severity, CVSS 5.0. EPSS: 43.8% chance of exploitation in the next 30 days.

Universal Plug and Play (UPnP) on Windows 98, 98SE, ME, and XP allows remote attackers to cause a denial of service via (1) a spoofed SSDP advertisement that causes the client to connect to a service on another machine that generates a large amount of traffic (e.g., chargen), or (2) via a spoofed SSDP announcement to broadcast or multicast addresses, which could cause all UPnP clients to send traffic to a single target system.

Affected products

• Microsoft Windows 98: any version
• Microsoft Windows 98se: any version
• Microsoft Windows Me: any version
• Microsoft Windows XP: any version

Published 2001-12-20. Last modified 2026-06-16.