A breach seller dumped a dataset of 73M AT&T customers online, three years after a hacker teased such a leak; AT&T won’t say how its users’ data was leaked (Zack Whittaker/TechCrunch)

Zack Whittaker / TechCrunch:
A breach seller dumped a dataset of 73M AT&T customers online, three years after a hacker teased such a leak; AT&T won’t say how its users’ data was leaked  —  Three years after a hacker first teased an alleged massive theft of AT&T customer data, a breach seller this week dumped the full dataset online.