SK Telecom
Massive data leak affecting multiple users; consumer agency ordered compensation of $67 per user
Retail & E-Commerce Data Breaches (355862 indexed)
Post Office Limited
Data breach affecting Horizon IT scandal victims caused by entirely preventable security failure
Leroy Merlin France
French home improvement retailer's loyalty program data breach affecting customers
Canada Life
Threat actor claimed 5.5 million records exposed including customer, employee, and corporate data via Salesforce
Post Office Limited
Data breach affecting Horizon IT scandal victims; ICO issued reprimand for entirely preventable breach
Post Office
Accidental publishing of data about wrongfully convicted Horizon IT scandal operators' names
Leroy Merlin France
Loyalty program data breach affecting customers; December 2025 security incident
Coupang
33.7 million customer accounts breached; personal information exposed
Post Office Limited
Data breach exposed names of Horizon IT scandal victims; ICO reprimand issued for preventable breach
Post Office Limited
Preventable data breach exposed names of Horizon IT scandal victims
Network breach
Network breach exposed sensitive healthcare billing data for 1.26 million people
Marquis Software Solutions
Data breach exposed over 788,000 financial records of bank and credit union customers
Leroy Merlin France
Leading French home improvement retailer disclosed data breach affecting customers' loyalty program data
TriZetto Provider Solutions
PHI of 3.4 million individuals exposed through unauthorized IT access
Leroy Merlin France
Loyalty program data breach affecting customer data
Post Office Limited
Entirely preventable data breach affecting Horizon IT scandal victims, resulted in ICO reprimand
Marquis Software Solutions
788,000 financial records compromised in ransomware attack; banking customer data exposed
Sax
Data breach disclosed involving 2024 data exposure
TransUnion
One of seven largest banking data breaches of 2025
Prosper Marketplace
One of seven largest banking data breaches of 2025
Leroy Merlin France
Leading French home improvement retailer data breach affecting customers' loyalty program data
Marquis (Fintech)
Ransomware attack exposed banking customer data including personal information and financial records
Prosper Marketplace
Nearly 20 million individuals affected in data breach at fintech company
Home Depot
Leaked GitHub token exposed internal systems with write permissions to private repos for one year