KT Corp
Data breach resulting in massive fine from South Korea's Personal Information Protection Commission
Finance & Banking Data Breaches (11599 indexed)
Medical billing company
Ransomware attack exposed protected health data on 1.3 million people; data leaked to dark web
Meta (Facebook)
2019 breach exposed hundreds of millions of Facebook passwords
Gaming accounts (Kaspersky research)
Over 11 million gaming account credentials exposed and found on dark web
Huntsville Hospital Health System
Third-party data breach exposed patient information at hospital facilities
Synnovis NHS
Thousands of patient records stolen in major ransomware cyberattack affecting NHS trust in Essex
Yearslong data breach of residents' private health-related information
Yearslong data breach of residents' private health-related information
Meta/Facebook
2019 breach exposed hundreds of millions of Facebook passwords; fined $101.5M
ANTS (French ID Agency)
Cyberattack exposed 19 million records with personal data linked to French identity documents
Ransomware attack
Ransomware attack exposed sensitive data including driver's license numbers from Multiethnic Cohort Study
Spectrum (Charter Communications)
Data breach exposed 4.9 million confirmed accounts with 42 million records claimed stolen
Unnamed Medical Billing Company
Ransomware attack exposed protected health data on 1.3 million people to dark web
Medical billing company (unnamed)
2025 ransomware attack exposed protected health data on 1.3 million people to dark web
KT Corporation
Customer data breach at South Korean telecommunications company, fined $39 million
Healthcare billing company data breach exposed sensitive information affecting 1.26
Healthcare billing company data breach exposed sensitive information affecting 1.26 million people
PIH Health
2024 ransomware hacking incident exposed 2.95 million patient records
French telco subsidiaries
Data breach with cybersecurity vulnerabilities; fined €42 million by French regulator in Jan 2026
Data security incident affecting personal information, $40M settlement reached
Data security incident affecting personal information, $40M settlement reached
Huntsville Hospital Health System
Third-party data breach exposed patient information at multiple facilities
Synnovis NHS
Thousands of patient records stolen during ransomware attack on Mid South Essex Foundation Trust
Suno (AI music platform)
Data breach exposed 55 million user accounts, confirmed by Have I Been Pwned
A now-patched vulnerability in Azure Cosmos DB could have let an attacker escape the
A now-patched vulnerability in Azure Cosmos DB could have let an attacker escape the service's Gremlin query sandbox and obtain full read and write access to databases across customer tenants, according to Wiz. Wiz, whi
Cyberattack tools and infrastructure used by North Korea’s Lazarus Group appear to have
Cyberattack tools and infrastructure used by North Korea’s Lazarus Group appear to have been shared with ransomware criminals targeting South Korean organizations — further evidence of deepening entanglement between Pyon
In a filing for federal regulators, Massachusetts-based Analog Devices said intruders
In a filing for federal regulators, Massachusetts-based Analog Devices said intruders had exfiltrated data from its networks earlier this summer, but the scope of the incident is still under investigation.