The host is installed with Microsoft Windows XP or Windows server 2003 or Windows server 2008 or Windows Vista or Windows 7 or Windows server 2008 R2 and is prone to elevation of privilege vulnerability. A flaw is present in Client/Server Run-time Subsystem (CSRSS) which fails to restrict the arbitrary code to be executed in the context of another process. Successful exploitation allows remote attacker to gain complete access to the affected system.