UniCredit SpA, Italy’s No. 1 bank, said hackers took biographical and loan data from 400,000 client accounts in one of the biggest breaches of European banking security this year.
The attack occurred in September and October of 2016 and June and July of this year, according to an emailed statement from the bank on Wednesday. UniCredit only discovered the breaches this week, two people familiar with the matter said, asking not to be identified discussing a possible criminal matter.