CVE-2003-0659: Microsoft Windows 2000

High severity, CVSS 7.2. EPSS: 43% chance of exploitation in the next 30 days.

Buffer overflow in a function in User32.dll on Windows NT through Server 2003 allows local users to execute arbitrary code via long (1) LB_DIR messages to ListBox or (2) CB_DIR messages to ComboBox controls in a privileged application.

Affected products

• Microsoft Windows 2000: any version
• Microsoft Windows 2003 Server: version enterprise only; version enterprise_64-bit only; version r2 only; version standard only; version web only
• Microsoft Windows Nt: version 4.0 only
• Microsoft Windows XP: any version

Published 2003-11-17. Last modified 2026-06-16.