An elevation of privilege vulnerability exists when Microsoft Windows fails to properly sanitize handles in memory. An attacker who successfully exploited the vulnerability could run arbitrary code as System. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.To exploit the vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application designed to elevate privileges. The update addresses the vulnerability by correcting how Windows sanitizes handles in memory.