Wildcard certificates on my ColdFusion 11 are expired, i am having the new certificates with me. How to import and install new certificates on the CF Servers
This is not a ColdFusion thing, it's a web server thing. Use the appropriate instructions for Apache, IIS or whatever you're using as a web server for this.
Generally, the process for any of those is that you'll need to generate a certificate signing request (CSR) and retain the private key you use for that. Then, you'll get the actual certificate from your vendor or whoever, and you'll need to merge it with the private key and install it. Finally, you configure your web server to use it.
Dave Watts, Fig Leaf Software