Security update for #Lync 2010

Microsoft just released a security update for the Lync PC client and Communicator 2007 R2 client, classified as important which means that you should roll it out ASAP.
It will be rolled out automatically via windows update if your clients are configured to recive updates automatically.

The most severe vulnerabilities could allow remote code execution if a user views shared content that contains specially crafted TrueType fonts.

Read more here :