Advantest confirms ransomware attack exposed personal data

Advantest Corporation has confirmed that a ransomware attack in February 2026 exposed personally identifiable information. The Japanese semiconductor equipment manufacturer initially reported the breach but was unable to determine if data was stolen. The exposed data includes contact information, dates of birth, Social Security Numbers, national ID numbers, driver’s licenses, passport numbers, medical information, financial information, and other ID numbers. The company has notified affected individuals and is offering free identity theft and credit monitoring services to mitigate the risk of fraud and identity theft. Advantest has not found any public claims from ransomware groups regarding the attack.