Cyberattack on Optus Potentially Exposes Millions of Customer Accounts

SYDNEY—A cyberattack on one among Australia’s largest telecoms corporations may have accessed the non-public info of as many as 9.8 million prospects, in what one lawmaker known as probably the most important knowledge breach in recent times.

Optus, an Australian unit of Singapore Telecommunications Ltd., mentioned it doesn’t but know who was behind the cyberattack that would have uncovered buyer info relationship again to 2017, together with names, dates of beginning and cellphone numbers. The corporate, which mentioned it first turned conscious of the breach on Wednesday, mentioned some id paperwork may also have been compromised.