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Dentsu Confirms Data Breach at U.S. Subsidiary Merkle

🔒 Dentsu disclosed a cybersecurity incident at its U.S. subsidiary Merkle, saying attackers accessed and stole files containing client, supplier, and employee information. The company detected abnormal activity, proactively took certain systems offline, and initiated incident response procedures while engaging third‑party responders. A circulated memo indicated exposed payroll and bank details, salary and National Insurance numbers, and personal contact details; impacted individuals are being notified and authorities in affected countries have been informed. Dentsu said Japan-based systems were not impacted and that the full scope and financial impact remain under investigation; no ransomware group has claimed responsibility so far.