The 72 Biggest Data Breaches of All Time [Updated 2023] | UpGuard

This report catalogs 83 of the largest data breaches and security incidents (2005–2025), detailing incident dates, estimated impacted records, exposed data types, attack vectors (misconfiguration, credential stuffing, API scraping, supply-chain compromise, ransomware, phishing), named threat actors/groups, and mitigation recommendations such as MFA, patching, secure credential management, and third‑party risk controls.