The voting machines that the U.S. will use in the 2020 election are still vulnerable to hacks. A group of ethical hackers tested a bunch of those voting machines and election systems (most of which they bought on eBay). They were able to crack into every machine, The Washington Post reports. Their tests took place this summer at a Def Con cybersecurity conference, but the group visited Washington to share their findings yesterday. A number of flaws allowed the hackers to access the machines, including weak default passwords and shoddy encryption. The group says the machines could be hacked by anyone with access to them, and if poll workers make mistakes or take shortcuts, the machines could be infiltrated by remote hackers.