Out-of-band security update for .NET Framework, December 2011
On December 29, 2011, Microsoft released an out-of-band security update for all supported versions of Microsoft .NET Framework.
Latest Security Updates
Reason for update
Vulnerabilities in .NET Framework
Get security updates automatically
You may already have the update if you have automatic updating turned on. To learn about automatic updating, see Update your PC automatically.
If you do not have automatic updating turned on, or to check whether you need the update, go to Microsoft Update. Microsoft Update is an online tool that will scan your computer and provide you a report about what updates your computer needs.
Download updates from the Microsoft Download Center
Security updates can be downloaded from the Microsoft Download Center. Find them by doing a keyword search using the words security update and the name of the month the update was released.
Technical information about security updates
Read the Microsoft Security Response Center blog for updated information. IT professionals and systems administrators, go to Microsoft TechNet for detailed information about updates.
Other steps you can take to help protect your computer