Semiconductor Equipment Manufacturer Discloses Data Breach from February Ransomware Attack

Advantest Corporation, a major semiconductor testing equipment manufacturer, confirmed that a February 2026 ransomware attack resulted in the theft of personally identifiable information including Social Security numbers, passport details, medical records, and financial data. The company initially could not confirm data extraction during the breach but has now notified affected individuals of the compromise. Advantest is offering 18 months of complimentary identity theft monitoring through Kroll and recommends vigilance against fraud and phishing attempts.

Advantest Corporation discovered the breach in February 2026 when unauthorized actors penetrated its network infrastructure. The company manufactures testing equipment critical to semiconductor production worldwide. Initially uncertain whether data had been extracted, Advantest waited until October to formally confirm that personal records had been stolen, then began notifying affected individuals of the compromise.

The exposed dataset encompasses numerous sensitive categories spanning contact details, identification documents, medical records, and banking information. Advantest has not publicly identified how many people were affected or whether the compromised records belonged to customers, employees, or business partners. The firm has found no evidence that the stolen information has been publicly released or actively misused to date.