Microsoft Office ClickToRun Security Feature Bypass Vulnerability

A security feature bypass vulnerability exists in the way that Office Click-to-Run (C2R) components handle a specially crafted file, which could lead to a standard user, any AppContainer sandbox, and Office LPAC Protected View to escalate privileges to SYSTEM.

To exploit this bug, an attacker would have to run a specially crafted file. The security update addresses how C2R components handle these files.