In addition to the security update that is described in bulletin MS15-058, this security update also contains all the updates that are included in cumulative update packages 1 through 16.
For more information about the SQL Server 2012 builds that were released after SQL Server 2012 Service Pack 1 was released, click the following article number to view the article in the Microsoft Knowledge Base:
How to obtain and install the update
Method 1: Microsoft Update
Method 2: Microsoft Download Center