COMPUTER FOLKS:
Here are the details about remote access vulnerability through the modem connecting polling place voting machines with the central vote-counting server in each county elections office. This applies specifically to all Diebold systems (1,000 counties and townships), and may also apply to other vendors. The prudent course of action is to disconnect all modems, since the downside is small and the danger is significant.
The central servers are installed on unpatched, open Windows computers and use RAS (Remote Access Server) to connect to the voting machines through telephone lines. Since RAS is not adequately protected, anyone in the world, even terrorists, who can figure out the server's phone number can change vote totals without being detected by observers.
The passwords in many locations are easily guessed, and the access phone numbers can be learned through social engineering or war dialing.
http://www.blackboxvoting.org/#breaking