EY (Ernst & Young)
Third-party vendor breach exposed sensitive tax client data after 81-day notification delay
Hospitals, clinics, insurers, and medical-IT vendors are the highest-value targets in cybercrime. Below is every healthcare-sector breach LeakTrace has indexed — patient records, HIPAA disclosures, ransomware victims, and supply-chain compromises.
Third-party vendor breach exposed sensitive tax client data after 81-day notification delay
740,000 records exposed due to improper security and safeguarding of personally identifiable information
Insider breach exposed data of 689,000 customers in 2024
Major data breach with significant fine from South Korea's Personal Information Protection Commission
Data breach affecting 689,000 users with unencrypted personal data accessed
2018 data breach resulted in €251 million fine from EU privacy regulator in December 2024
More than 3 million people impacted by breach of healthcare tech provider software affecting multiple counties
Over 11 million gaming account credentials exposed in 2024 data leaks discovered by Kaspersky DFI
Ransomware attack exposed personal data of 1.2 million individuals
Telecommunications company customer data breach in South Korea, resulted in $39M fine
2022 breach exposed 1.6 million users, resulted in ICO fine
Ransomware attacks in 2023 and 2024 exposed data on 3.2 million victims
2025 ransomware attack exposed protected health data on 1.3 million people; leaked to dark web
Unprotected database exposed 666,000 records including celebrity contact information
Two ransomware breaches in 2023-2024 affected 3.2 million victims; settled lawsuit for $14M
11 million gaming account credentials exposed
Thousands of patient records stolen in ransomware cyberattack by Synnovis
Two ransomware breaches in 2023-2024 affected 3.2+ million patients, $14M settlement
19,027 patient records exposed with personal and medical information
Among the seven largest banking data breaches of 2025
Thousands of NHS patient records stolen in ransomware attack affecting healthcare services
689,000 users' unencrypted data accessed by former employee
Data breach resulting in €42 million GDPR fines for lack of basic security controls in 2024