Know of any utilities or techniques to change permissions on a windows file?

I'm using CF9 and running the server as a local user, default setup.

I am creating an Excel xlsx file using cfspreadsheet, then renaming the file using cffile.

I then place it in the user's personal directory using CFFTP. The file does get there but...

Problem: File permissions are for admin and domain admin. The poor user can't open their own file!

SO:

How can I change the windows file permission to allow the current logged in user to access their own Excel 2010 file?

OR:

How can I modify the CF9 server to make created  file permissions for "domain users"?

Thanks so much in advance!