The update does not provide any new fixes and improvements, it’s solely a security update that resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file.
For more details see https://support.microsoft.com/en-us/help/4022204/june-12-2018-cumulative-update-for-sharepoint-server-2010-kb4022204
You can download this update from http://www.microsoft.com/downloads/details.aspx?familyid=413e0765-5f39-4c30-ad76-a99907f7ef9c
