CISA
US agency breached through Cisco vulnerability; FIRESTARTER backdoor allowed persistent access through March 2026
Finance & Banking Data Breaches (12230 indexed)
Ransomware attack
Ransomware attack exposed data from Multiethnic Cohort Study including driver's license numbers and voter IDs
Fortinet FortiGate
73,932 FortiGate systems exposed with valid administrative and VPN credentials
Conduent
Breach compromised personal data of millions nationwide, notifications sent a year later
Ransomware attack caused data
Ransomware attack caused data leak exposing patient information from Multiethnic Cohort Study including driver's license and voter data
Ransomware attack exposing personal data of 1.2 million individuals
Ransomware attack exposing personal data of 1.2 million individuals
UK Biobank
Confidential health records exposed online and offered for sale on Chinese website
Ernst & Young (EY)
Third-party vendor breach exposed tax client data after 81-day notification delay
CareCloud
Healthcare software firm informed SEC of potential patient data leak; electronic health records may have been leaked after system intrusion
Companies House UK
Data exposed during five-month security issue affecting UK firm records
Companies House
UK firm records exposed during five-month security issue affecting all registered companies
Driver's license numbers and voter information from Multiethnic Cohort Study exposed in
Driver's license numbers and voter information from Multiethnic Cohort Study exposed in ransomware attack
UK Biobank
Confidential health records from flagship medical research project exposed online, with data leaked multiple times
CISA (US Department)
Breached through Cisco vulnerability; FIRESTARTER backdoor allowed persistent access through March 2026
Huntsville Hospital Health System
Third-party data breach exposed patient information
GuardDog
Telehealth company accessed and shared patient medical records from Epic platform with law firms without authorization
Companies House (UK)
Data exposed during five-month security issue; all UK firms urged to check records
UK Biobank
Confidential health records from medical research project exposed online multiple times
Foster City
Ransomware attack forced city computer system offline for days; state of emergency declared
Ransomware attack data
Ransomware attack data leak from Multiethnic Cohort Study exposed driver's license numbers and voter registration data
UK Biobank
Confidential health records from flagship medical research project leaked multiple times and exposed online
CISA (U.S. Department)
US agency breached through Cisco vulnerability with FIRESTARTER backdoor malware
Ransomware attack with data
Ransomware attack with data leak including Multiethnic Cohort Study data with driver's license numbers and voter IDs
UnitedHealthcare
One of the largest healthcare data breaches in American history involving multiple companies