New SUPEE-9652 patch can be downloaded as usual from Downloads page:
https://magento.com/tech-resources/download#download1972 or installed as a regular Magento upgrade via Downloader (it is included in Magento 184.108.40.206 version).
To apply the patch you need SSH access (shell access actually, SSH is just most used way to get shell access) to the server. If you have no SSH access, you can refer to How to apply SUPEE-9652 without SSH.
If you wish to save time and have us to install these patches for you, simply click here to order installation.
Step 0: Preparations
Note: Make sure to Disable Magento Compiler at System > Configuration > Tools > Magento Compiler and clear compiled cache.
Step 1: Verify your Magento version
As you can see in the example, it is Magento 220.127.116.11
Step 2: Download corresponding patches
Patches are obtained from https://magento.com/tech-resources/download#download1972
Make sure to get the right version.
Step 3: Place patches into Magento Root directory
Upload your files into Magento root directory and execute it also directly in Magento root directory.
Step 4: Run the patches
Step 5: Verification and flush of PHP opcode cache
Test that your store is working. If you use PHP opcode caches (OPCache/APC/XCache/eAccelerator) make sure to flush it after patching (or restart webserver), otherwise code will continue to run from caches.