Dentsu Data Breach
Dentsu experienced a data breach that was reported on October 29, 2025. Dentsu warns staff of data breach after Merkle hit by cyber 'security incident'
Key Facts
- Organization
- Dentsu
- Date Reported
- October 29, 2025
- Incident Type
- unauthorized access
- Industry
- Financial Services
- Severity Score
- 5/10
- Confidence Level
- medium
- Tags
Source
View original source - External link to primary source documentation
Understanding unauthorized access Incidents
Unauthorized access breaches occur when attackers gain entry to systems without permission through credential theft, vulnerability exploitation, or social engineering.