No, I don’t believe it is 100% foolproof. But in order to commit voter fraud someone would have to compromise both the electronic record, recorded when the ballot is slid into the ballot box, and the paper record. Makes it a little harder but not impossible. I think the greatest vulnerability would be illegal voting or ballot stuffing. Photo ID for voters is not required. Each polling place has a printout of all registered voters for that polling location. I simply sign next to my name on the printout and take my ballot.
And those two areas are where fraud has definitely succeeded in electing dems.