DentaQuest Breach Affects 15 Million in Largest US Health Data Breach Reported in 2026
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DentaQuest disclosed a May 2026 cyberattack that exposed sensitive personal, government and health information for an estimated 15–23+ million people; an extortion group claiming responsibility (ShinyHunters) reportedly leaked roughly 234 GB of data. The breach — discovered May 20 with unauthorized access from May 17–20 — may include names, addresses, SSNs, member and government identifiers, and dental/vision health and billing records; DentaQuest is notifying affected individuals and offering 24 months of credit monitoring while the investigation continues.
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