A remote code execution vulnerability exists in Windows Remote Desktop Gateway (RD Gateway) when an unauthenticated attacker connects to the target system using RDP and sends specially crafted requests. This vulnerability is pre-authentication and requires no user interaction. An attacker who successfully exploited this vulnerability could execute arbitrary code on the target system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.To exploit this vulnerability, an attacker would need to send a specially crafted request to the target systems RD Gateway via RDP.The update addresses the vulnerability by correcting how RD Gateway handles connection requests.