IMPORTANT: read the following post before applying the security fix:
With January 2016 PU we have released security fixes for SharePoint which are offered through Microsoft Update.
For the following SharePoint products and components fixes have been released:
SharePoint 2007 Suite:
SharePoint 2010 Suite:
SharePoint 2013 Suite:
- SharePoint Foundation 2013
See the security bulletin below for more details and KB number for the relevant fixes: