AT&T says outage caused by software update, ABC News reports

AT&T believes the February 22 outage was “caused by the application and execution of an incorrect process” as it was expanding its network, and “not a cyber attack,” the company tells ABC News in a statement, Max Zahn, Jon Haworth, Josh Margolin, Jack Date, and Luke Barr report. “We are continuing our assessment of today’s outage to ensure we keep delivering the service that our customers deserve,” the statement continued. According to preliminary information from two sources familiar with the situation, the software update went wrong, and there was nothing “nefarious or malicious” about the incident.