A serious security vulnerability has been discovered in the “remote desktop services” component built into Windows XP, Windows 7 and Windows 2003. This is the first XP update for years, which proves that the threat is significant. More about this on krebsonsecurity.com/2019/05/microsoft-patches-wormable-flaw-in-windows-xp-7-and-windows-2003/

This vulnerability does not affect Windows 10 and Windows 8.