The biggest data breaches in 2024: 1 billion stolen records and rising

This report summarizes several of the largest 2024 cybersecurity incidents — including AT&T phone-record thefts, the Change Healthcare ransomware/data theft affecting tens to hundreds of millions of Americans, the Synnovis ransomware attack disrupting UK healthcare services, and a wide-ranging Snowflake compromise that exposed customer datasets — highlighting massive data exposure (personal, medical, financial), operational outages, credential-based intrusions, and failures of protections like MFA across multiple sectors.