Merkle, Dentsu Subsidiary, Suffers Cybersecurity Incident Exposing Staff and Client Data

Timeline

1. 28.10.2025 23:16 1 articles · 13d ago

   Dentsu's Merkle Subsidiary Suffers Data Breach

   Merkle, a U.S.-based subsidiary of Dentsu, experienced a cybersecurity incident that exposed staff and client data. The company detected abnormal activity, took systems offline, and is investigating the scope and impact. The incident affected certain systems, leading to the exposure of bank and payroll details, salary information, National Insurance numbers, and personal contact details of employees, clients, and suppliers. Dentsu has engaged third-party incident response services and notified relevant authorities. The financial impact is expected, but the full extent of the breach remains under investigation.

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   • Advertising giant Dentsu reports data breach at subsidiary Merkle — www.bleepingcomputer.com — 28.10.2025 23:16

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Information Snippets

• Merkle, a subsidiary of Dentsu, experienced a cybersecurity incident exposing staff and client data.

  First reported: 28.10.2025 23:16
  1 source, 1 article
  Show sources

  • Advertising giant Dentsu reports data breach at subsidiary Merkle — www.bleepingcomputer.com — 28.10.2025 23:16

• The incident involved abnormal activity within Merkle's network, leading to the shutdown of certain systems.

  First reported: 28.10.2025 23:16
  1 source, 1 article
  Show sources

  • Advertising giant Dentsu reports data breach at subsidiary Merkle — www.bleepingcomputer.com — 28.10.2025 23:16

• Exposed data includes bank and payroll details, salary information, National Insurance numbers, and personal contact details.

  First reported: 28.10.2025 23:16
  1 source, 1 article
  Show sources

  • Advertising giant Dentsu reports data breach at subsidiary Merkle — www.bleepingcomputer.com — 28.10.2025 23:16

• The incident affected systems in North America, EMEA, and APAC regions, but not Japan-based network systems.

  First reported: 28.10.2025 23:16
  1 source, 1 article
  Show sources

  • Advertising giant Dentsu reports data breach at subsidiary Merkle — www.bleepingcomputer.com — 28.10.2025 23:16

• Dentsu has notified relevant authorities and engaged third-party incident response services.

  First reported: 28.10.2025 23:16
  1 source, 1 article
  Show sources

  • Advertising giant Dentsu reports data breach at subsidiary Merkle — www.bleepingcomputer.com — 28.10.2025 23:16

• The full scope and impact of the incident are still under investigation.

  First reported: 28.10.2025 23:16
  1 source, 1 article
  Show sources

  • Advertising giant Dentsu reports data breach at subsidiary Merkle — www.bleepingcomputer.com — 28.10.2025 23:16