You have two choices to install this CU. Mandatory baseline is our SP1 but it is recommended to install SP2 before to proceed with this CU.

It needs to install SP1 before you install post SP1 updates. See also http://blogs.technet.com/b/stefan_gossner/archive/2012/07/11/is-sp1-installed-on-your-sharepoint-2010-farm.aspx

Second and recommended choice is to have SP2 as baseline for this CU: http://blogs.msdn.com/b/joerg_sinemus/archive/2013/07/24/sharepoint-server-2010-sp2.aspx

MSF2010:
2863938 The full server package for Microsoft SharePoint Foundation 2010
http://support.microsoft.com/default.aspx?scid=kb;EN-US;2863938

Download link: http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=2863938&kbln=en-us

SPS2010:
2863913 The full server package for SharePoint Server 2010 and contains also the MSF2010 fixes so you need only this one package.
http://support.microsoft.com/default.aspx?scid=kb;EN-US;2863913

Download link: http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=2863913&kbln=en-us

Important for all Server Applications listed above:
After applying the preceding updates, run the SharePoint Products and Technologies Configuration Wizard or “psconfig –cmd upgrade –inplace b2b -wait” in command line. This needs to be done on all servers in the farm with SharePoint installed. You can run psconfig in parallel on all SharePoint machines.

SP1 references:

Posts by CAPES:
SharePoint 2010 SP1 and the June Cumulative Update for SharePoint 2010

Office 2010 Service Pack 1 - 5 Common questions regarding the Service Pack

Main article for all Office 2010 February 2014 Updates:
http://support.microsoft.com/kb/2925785