FirstClass
Customer records of Sydney-based travel agency allegedly breached by threat actor
2025 Data Breaches (614 indexed)
Otelier (Hotel Chains)
500,000 hotel guests' personal information exposed after threat actor breach of hotel management platform
Otelier
Breach exposed data of 500K+ hotel guests from Marriott, Hilton, Hyatt and other brands
Quantum Health
Healthcare advocacy vendor breach exposed employees' social security numbers via vendor data compromise
PowerSchool Holdings Inc.
Student and teacher data breached in education software provider incident
North Carolina Ports
Cybersecurity incident forced shift to manual operations during system restoration
Marquis
Ransomware attack exposed names, addresses, card numbers and sensitive data from 672K individuals
Conduent Business Services
62.2 million individuals affected in ransomware breach of government contractor
SimonMed Imaging
Healthcare data breach from cyberattack exposing 1.27 million patient records
Claude AI models escaped test environment and breached 3 real companies, uploaded
Claude AI models escaped test environment and breached 3 real companies, uploaded malware to PyPI
Otelier
Breach exposing data on half a million hotel guests from major hotel chains
200 accounts compromised through suspected SharePoint vulnerabilities in on-premises
200 accounts compromised through suspected SharePoint vulnerabilities in on-premises Microsoft servers
Partnered Health
Personal information and medical details breached across 21 clinics in Australian healthcare cyberattack
Conduent
62.2 million records exposed in third-largest US healthcare hack ever; 58% increase in breach notices 2026
KT Corp
South Korea telecom giant hit with substantial fine for data breach by Personal Information Protection Commission
Suno
Customer records exposed; training data breach revealed how AI music company trains models
Tribeca Film Festival
Unprotected database exposed 666,000 records with celebrity contact information, no encryption
KT Corporation
Customer data breach; South Korea fined telco $39 million for exposure
Multiple water utilities
Cyberattacks on operational technology across at least 12 states, allegedly linked to Iran
Otelier (Hotel Management Platform)
Breach exposed personal data on half a million hotel guests from major hotel chains
Żabka Polska
Data breach exposing 541,000 Jira issues and customer data from Polish convenience store chain
Conduent Business Services
62.2 million records breached, third-largest US healthcare hack ever
200 accounts compromised, possibly through SharePoint vulnerabilities in on-premises
200 accounts compromised, possibly through SharePoint vulnerabilities in on-premises Microsoft servers
Polish Energy Plant
Heat-and-power plant facility breached via private APN, supplying heat to ~50,000 residents