Dentsu is a global marketing and advertising conglomerate that includes the Merkle digital marketing subsidiary.
Overview
Dentsu is a global marketing and advertising conglomerate that includes the Merkle digital marketing subsidiary. It has experienced multiple data breach incidents that exposed employee data, prompting legal action from current and former employees and highlighting significant cybersecurity risk for large marketing organizations.
Related Threat Clusters
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Dentsu Data Breach Leads to Legal Action by Employees
A cyberattack on Dentsu's Merkle unit resulted in the theft of sensitive employee information, prompting over 150 former employees to organize for legal action. The Information Commissioner's Office has received a…
2 articles · Updated November 26, 2025 -
Dentsu's Merkle Subsidiary Suffers Data Breach Exposing Employee Information
Dentsu, a global marketing giant, reported a cyberattack on its subsidiary Merkle, resulting in the theft of sensitive employee data, including bank and payroll information. The breach was attributed to unidentified…
4 articles · Updated October 29, 2025 -
Dentsu Reports Data Breach at Subsidiary Merkle Affecting Employee Data
Dentsu, a global marketing giant, has reported a cyberattack on its subsidiary Merkle, resulting in the theft of sensitive employee data, including bank and payroll information. The breach was confirmed in…
4 articles · Updated October 29, 2025
Recent Intelligence Reports
- Dentsu's UK data breach sparks employee-led legal push — Storyboard18 · November 26, 2025
- More than 150 ex-Dentsu employees plan legal action for data breach — Campaignasia · November 21, 2025
- Dentsu Subsidiary Breached, Employee Data Stolen — Darkreading · October 29, 2025
- Marketing giant Dentsu warns staff after Merkle data raid — Theregister · October 29, 2025