CVE-2000-0834: Microsoft Windows 2000

High severity, CVSS 7.5. EPSS: 39.6% chance of exploitation in the next 30 days.

The Windows 2000 telnet client attempts to perform NTLM authentication by default, which allows remote attackers to capture and replay the NTLM challenge/response via a telnet:// URL that points to the malicious server, aka the "Windows 2000 Telnet Client NTLM Authentication" vulnerability.

Affected products

• Microsoft Windows 2000: any version

Published 2000-11-14. Last modified 2026-06-16.