I'm not sure offhand. If I were curious about your database, I might try seeing if I could find a way to unhide the tables. If I was really malicious I might look for weaknesses in your form design that would allow for sql injection attacks. Also, I might just try to find your backend. This might be as easy as scanning the network for mdb files to see if it turns up. Viewing your mde in a hex file can also provide some clues. I created an mde with a linked table and it wasn't very hard to find the back end just by looking at the file in a binary editor:
<img src="http://northernocean.net/etc/mrexcel/20110906.png" />
And I really don't know much about these things ...
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