SUPEE-10570, Magento Commerce 126.96.36.199 and Open Source 188.8.131.52 contain multiple security enhancements that help close remote code execution (RCE), cross-site scripting (XSS, and other issues). These releases also include small functional fixes listed in the release notes.
Information on all the changes in 184.108.40.206 and 220.127.116.11 releases is available in the Magento Commerce and Magento Open Source release notes.
Ideally you should have your developer apply the patches. Alternatively, please raise a ticket and Dx3webs will apply and 'best endeavours' basis. (Please note we will backup your site.. apply the patches and request that you check that all is well. If not the best we can do is to roll back the patches at which time you will need to seek support from your developer)