However, representatives of the secretaries of state in Texas, California and Ohio, all users of the affected Diebold systems, said they have not received notification of the flaw from Diebold.

The Diebold spokesman said that the company uses various methods to contact states, including personal notification of officials through sales and support channels.

The spokesman also said that Diebold is searching for technology that can lock the affected machines to prevent such intrusions and would alert officials should any tampering occur.