NPR: Cyber Experts Warn Of Vulnerabilities Facing 2020 Election Machines

"Governments contract with private companies to provide voting equipment and other services and there are no laws requiring any sort of breach disclosure or third party security auditing. Even the governments themselves are usually barred from hiring a security firm to investigate the machines they serve to voters."

https://www.npr.org/2019/09/04/755066523/cyber-experts-warn-of-vulnerabilities-facing-2020-election-machines