CVE-2000-1217: Microsoft Windows 2000

Medium severity, CVSS 4.6. EPSS: 1.7% chance of exploitation in the next 30 days.

Microsoft Windows 2000 before Service Pack 2 (SP2), when running in a non-Windows 2000 domain and using NTLM authentication, and when credentials of an account are locally cached, allows local users to bypass account lockout policies and make an unlimited number of login attempts, aka the "Domain Account Lockout" vulnerability.

Affected products

• Microsoft Windows 2000: any version

Published 2000-11-21. Last modified 2026-06-16.