New Codebase, Old SQL?

Last week I lost my site files due to a nasty security breach. My SQL database was safe, but all the files associated with my wordpress installation are gone. And of course I don’t have a backup. It was all stock though, so nothing was really lost.

I’m not sure what version of wordpress I was running, I think it was up to date as of about a month ago. Will I have problems if I just dump the current version onto my site and point it at my old SQL database? I searched around the docs for a bit but I’m not quite sure what to be searching for.