Hello! I have Free CIS, but I don’t have internet connection. Where I can UpDate (download) my CIS virus database?
You will need an internet connection. There are is no official possibility to update from a file like other scanners can.
However you can try Where can i download the latest full AV database?. But that may not be quite what you are looking for. Notice this bases.cav file gets only changed every week or so.