AT&T data breach: Millions of customers caught up in major dark web leak BBC.comAT&T says personal data from 73 million current and former account holders leaked onto dark web CNNAT&T investigating leak that dumped millions of customers’ data on dark web Yahoo! VoicesAT&T security breach affects millions. Here’s what to know The Associated PressData from 73M current, former customers leaked on dark web, AT&T confirms KABC-TV