Biggest Data Breaches in France [Updated 2025] | UpGuard

Executive summary: This report catalogs major French data breaches and ransomware incidents (2018–2025), including extremely large compromises such as France Travail (~43 million records) and Viamedis/Almerys (~33 million), as well as multiple healthcare, telecom, and public-sector incidents; it details exposed PII and medical records, attack vectors (phishing, social engineering, RaaS groups like LockBit and Vice Society), and regulatory actions, highlighting widespread national impact and elevated risks of identity theft, fraud, and service disruption.