CVE-2000-0673: Microsoft Windows 2000

Medium severity, CVSS 5.0. EPSS: 33.4% chance of exploitation in the next 30 days.

The NetBIOS Name Server (NBNS) protocol does not perform authentication, which allows remote attackers to cause a denial of service by sending a spoofed Name Conflict or Name Release datagram, aka the "NetBIOS Name Server Protocol Spoofing" vulnerability.

Affected products

• Microsoft Windows 2000: any version
• Microsoft Windows Nt: version 4.0 only; version terminal_server only

Published 2000-07-27. Last modified 2026-06-16.