Security Update for Windows XP SP3 (KB4500331) 
Last Modified: 5/9/2019
Description: A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system. 

Description of the security update for the remote code execution vulnerability in Windows XP SP3, Windows Server 2003 SP2, Windows Server 2003 SP2 R2, Windows XP Professional x64 Edition SP2, Windows XP Embedded SP3, Windows Embedded POSReady 2009, and Windows Embedded Standard 2009

A remote code execution vulnerability exists in Remote Desktop Services in the affected Windows platforms.