Windows Server 2012 R2
Note: You should check http://support.microsoft.com for the latest version of the different files.
Note 2: These are not available in Windows Update.
Note 3: You can download them without entering your e-mail address and captcha if you are a Microsoft Premier customer and have a http://Premier.Microsoft.com account.
Note 4: Carefully review the list and decide which might be applicable to your unique environment.
Note 5: Test in your test and your quality assurance environment.
Originally published Jul. 2014. Updated Jul. 2014.
The list has been moved to the Technet Wiki below.
List of Network related hotfixes post RTM for Windows 8.1 and Windows Server 2012 R2
This should help with getting the list updated sooner with the help of the WW community.