In late February, a massive network outage shot AT&T into the headlines for the wrong reasons: The company's terse statement on the matter asserted it wasn't a victim of a hack, but instead a coding error. Now the telecoms giant is in the news again, reacting to an actual cybersecurity problem that's causing it to reset customer account passcodes on a massive scale--affecting some 7.6 million current AT&T users. Weirdly, the leaked data forcing AT&T's hand actually dates back to a giant data leak that happened in 2019. It's a reminder that a data hack on a business can have effects that resonate for many years.