Breachesby GlyphDentaQuest
Disclosed May 22, 202627,400,000 affectedConfirmed
DentaQuest breach by ShinyHunters exposes Medicaid dental data of 15M+
Dental benefits administrator DentaQuest said attackers accessed its network May 17 to 20, 2026, exposing names, SSNs, Medicaid and Medicare numbers and dental health data. ShinyHunters leaked the data after failed negotiations; the confirmed count exceeds 15 million.
What is known
| People affected | 27,400,000 (as reported by the organization) |
|---|---|
| Disclosed | May 22, 2026 |
| Discovered | May 20, 2026 |
| Happened | May 17, 2026 |
| Attack | Extortion |
| Data exposed | NamesSocial Security numbersHealthInsuranceDates of birthEmailsGovernment IDsPhone numbersAddresses |
| Sector | Insurance · US |
| Status | Confirmed |
| Check your email | Have I Been Pwned |
Sources
California Attorney General breach notice: DentaQuestWashington Attorney General breach notice: DentaQuestNotice letter filed with the Delaware DOJ: DentaQuestOregon DOJ breach notice: DentaQuestHHS OCR breach report: DentaQuest (Health Plan, MA)DentaQuest disclosureHave I Been Pwned: DentaQuestDentaQuest data breach exposed info of 2.6 million accountsDentaQuest data breachTexas Attorney General data security breach report BR-0005182: DentaQuestVermont Attorney General breach report: DentaQuestIndiana Attorney General 2026 data breach report: DentaQuest
Notices filed
Other breaches at DentaQuest
History of this record
empty to https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/files/DB-October-Year-to-Date-Report-2026.pdfby weeklySource
empty to https://ago.vermont.gov/categories/security-breach-noticesby dailySource
2026-06-03 to 2026-05-22by backfillSource
empty to https://oag.my.site.com/datasecuritybreachreport/apex/DataSecurityReportsPageby backfillSource
health to insuranceby seedSource
phishing to extortionby seedSource
In May 2026, the dental benefits administrator DentaQuest was the target of a ShinyHunters "pay or leak" extortion campaign that resulted in the group publicly publishing hundreds of gigabytes of data allegedly obtained from the company. Th to Dental benefits administrator DentaQuest said attackers accessed its network May 17 to 20, 2026, exposing names, SSNs, Medicaid and Medicare numbers and dental health data. ShinyHunters leaked the data after failed negotiations; the confirmby seedSource
empty to DentaQuest breach by ShinyHunters exposes Medicaid dental data of 15M+by seedSource
empty to DentaQuestby backfillSource
["names","ssn","health","insurance"] to ["names","ssn","health","insurance","dob","emails","government-id","phone","addresses"]by backfillSource
2026-07-16 to 2026-06-03by backfillSource
empty to In May 2026, the dental benefits administrator DentaQuest was the target of a ShinyHunters "pay or leak" extortion campaign that resulted in the group publicly publishing hundreds of gigabytes of data allegedly obtained from the company. Thby backfillSource
[] to ["names","ssn","health","insurance"]by backfillSource
empty to organizationby backfillSource
empty to 27400000by backfillSource
other to healthby backfillSource
unknown to phishingby backfillSource
empty to 2026-05-20by backfillSource
First recordedby backfillSource
First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.