Executive Summary An elevation of privilege vulnerability exists when Microsoft Windows improperly handles reparse points. An attacker who successfully exploited this vulnerability could overwrite or delete a targeted file that would normally require elevated permissions.
To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and overwrite or delete files.
The security update addresses the vulnerability by correcting how Windows handles reparse points.
Update & Detail Windows Elevation of Privilege Vulnerability 
