Advantest discloses personal data theft months after ransomware attack

SecurityWeek reports that Advantest is notifying people that attackers stole personal information during a February 2026 ransomware attack. The company says it has no information suggesting the data has been made public or misused, but warns the incident may have increased the risk of identity theft or fraud. Advantest has not disclosed the total number affected; a California filing indicates more than 500 residents there were affected.