March 21st, 2012
Some critical vulnerabilities were reported in the Remote Desktop Protocol, that allows remote code execution if an attacker sends a sequence of specially crafted RDP packets to an affected system.
Read more on Microsoft RDP Vulnerability.
Parallels has come out with a security advisory in relation to this vulnerability, recommending immediate update for all Parallels Virtuozzo Containers(Windows servers) with the latest patches to ensure compatibility with the Windows Server update.
Please follow the KB that applies to Parallels Virtuozzo Containers for Windows http://kb.parallels.com/en/113480