Well, I see this as a small step 'on the way': to me it means there is a way in somewhere.
Microsoft Security Bulletin MS10-021 - Important
Vulnerabilities in Windows Kernel Could Allow Elevation of Privilege (979683)
Published: April 13, 2010
Version: 1.0
General Information
Executive Summary
This security update resolves several privately reported vulnerabilities in Microsoft Windows. The most severe of these vulnerabilities could allow elevation of privilege if an attacker logged on locally and ran a specially crafted application. An attacker must have valid logon credentials and be able to log on locally to exploit these vulnerabilities. The vulnerabilities could not be exploited remotely or by anonymous users.