Buffer overflow in the Telnet service in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, and Windows Server 2012 Gold and R2 allows remote attackers to execute arbitrary code via crafted packets, aka "Windows Telnet Service Buffer Overflow Vulnerability."
https://exchange.xforce.ibmcloud.com/vulnerabilities/99518
https://exchange.xforce.ibmcloud.com/vulnerabilities/99517
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-002
http://www.securitytracker.com/id/1031523