Breaches and incidentsBriefReported by a reputable outlet, citing the company
DentaQuest (dental benefits administrator, Sun Life US): ShinyHunters theft affects an estimated 15 million people
DentaQuest announced in early June 2026 that it was investigating an incident in a limited part of its network.
- Disclosed
What happened
- DentaQuest announced in early June 2026 that it was investigating an incident in a limited part of its network; the attacker had access for about three days in May. It reported the breach to HHS OCR as affecting an estimated 15 million individuals (HIPAA Journal, July 2026 report), which HIPAA Journal calls the 4th largest breach ever reported by a single HIPAA-regulated entity.
- Root cause / initial access: not disclosed.
- Attacker: ShinyHunters claimed responsibility, said 234 GB was exfiltrated, and began leaking data after negotiations failed; the leak contained about 2.6 million unique email addresses.
- Response: investigation and notifications ongoing; the total may rise.
Sources
- https://www.hipaajournal.com/july-2026-healthcare-data-breach-report/
- https://www.cm-alliance.com/cybersecurity-blog/june-2026-biggest-cyber-attacks-data-breaches-ransomware-attacks
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