SK Telecom
Massive data leak resulted in state-run consumer agency ordering $67 per user compensation
Healthcare Data Breaches (346146 indexed)
Medical Billing Company
2025 ransomware attack exposed sensitive protected health data on 1.3 million people, leaked to dark web in June 2026
Post Office Limited
Preventable data breach affecting Horizon IT scandal victims
Illuminate Education
Data breach affecting Wisconsin-based edtech company, settled with FTC
Post Office Limited
Data breach affecting Horizon IT scandal victims; reprimanded by ICO for preventable breach
Post Office Limited
Data breach affecting Horizon IT scandal victims; ICO reprimand issued Dec 2025
Amgen
Cloud data breach exposed patient health information and proprietary corporate data
Home Depot
Exposed access to internal systems including GitHub source code repos for approximately one year
700Credit
Data breach affecting approximately 10 million individuals with financial and personal information
Healthcare billing company network breach exposed sensitive patient data affecting 1.26
Healthcare billing company network breach exposed sensitive patient data affecting 1.26 million people
Prosper Marketplace and 700Credit
Data breach affecting approximately 20 million individuals across fintech and car dealership services
Post Office Limited
Entirely preventable data breach affecting Horizon IT scandal victims; reprimanded by ICO
Prosper Marketplace
Fintech company reported data breach affecting millions in financial data exposure
Post Office Limited
Data breach exposed names of Horizon IT scandal victims; ICO reprimand issued for preventable breach
Exact Sciences / Abbott
Data breach exposed sensitive personal information from at-home diagnostic test users
Marquis Software Solutions
788K financial records of bank and credit union customers compromised
Leroy Merlin France
Loyalty program data breach affecting customers, disclosed December 3, 2025
KT Corporation
Telecommunications company customer data breach resulted in KRW 53.979 billion fine from South Korea regulators
Multiple (Compilation Leak)
2 billion emails and 1.2 billion passwords compromised in massive credential compilation
Multiple (Compilation)
2 billion emails and 1.2 billion passwords compromised in massive credential compilation
Post Office Limited
Data breach exposed names of wrongfully convicted operators, entirely preventable
Post Office Limited
Data breach of Horizon IT scandal victims; ICO reprimand issued Dec 2025
700Credit
One of the seven largest banking data breaches of 2025
700Credit
Data breach affecting approximately 10 million car dealership service users