Electronic voting machine software could be programmed to alter votes and the outcome of an election. All electronic software is susceptible to these kind of things, and they can not be 100% prevented. There are many different things that can be done to prevent such a thing from happening but it can not be fully prevented.
In my opinion, Electronic Voting Machine Software can Be Programmed to Alter the Outcome of an Election. There are documented cases of major discrepancies and ethical malfeasance in the use and abuse of power and control of elections with voting machines being manipulated to favor one political party or to not count votes of another political party. Al gore v Ohio.