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TechRadar
TechRadar
Sead Fadilpašić

More than 9.5 million patients affected by Aesto Health breach — names, SSNs, financial details, health records and more stolen

Laboratory.
  • Aesto Health reported a December 2025 cyberattack breaching AWS infrastructure, affecting 9.5M patients
  • Stolen data includes PII, SSNs, medical histories, billing, and insurance information across 20+ clients
  • No dark web leaks confirmed; credit monitoring offered, marking 2nd‑largest healthcare breach of 2026

American healthcare technology company Aesto Health suffered the “second-largest confirmed healthcare data breach” of the year so far, having lost data on more than 9.5 million patients.

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