securityweek.comarticleAdvantest Discloses Data Breach Months After Ransomware Attack
Advantest, a Japanese maker of automatic test equipment for chipmakers, is notifying individuals that attackers stole personal data in the ransomware attack it disclosed in February 2026. Stolen data includes names, dates of birth, SSNs, passport and driver's license numbers, and medical and financial information. State filings show over 500 California, 14 Massachusetts and 8 Vermont residents affected. No ransomware group has claimed the attack.
TL;DR Advantest confirms its February 2026 ransomware attack led to theft of personal data, including SSNs and medical and financial records.
Organisations named here
- Advantest
- California Attorney General's Office
Technologies named here
- Advantest
Techniques named here
- Data exfiltration
- Ransomware attack
- Ransomware
Concepts named here
- Data breach notification
- Identity theft and fraud risk
Threat actors named here
- Unnamed ransomware attackers (no known ransomware group has claimed the attack on Advantest, disclosed February 2026)
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