The hack is a reminder that everyday infrastructure can be vulnerable to hackers—and that using ‘1234’ as a password is always a bad idea.

When standing at a crosswalk, you might press the button to cross and wonder if that button actually does anything. As it turns out, it's complicated.

Last April, a hacker hijacked crosswalk announcements to mimic Mark Zuckerberg and Elon Musk. Records obtained by WIRED ...