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Breach occurred 2026-05-23Verifieddentaquest.com
What happened
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. The data included 2.6M unique email addresses along with names, addresses and phone numbers. Much of the data appeared in healthcare enrollment files (ASC X12 transaction sets) with some containing Medicaid IDs, while additional data appeared in member records and related files. DentaQuest acknowledged "a cybersecurity incident involving unauthorized access to a limited portion of our network", and advised they had contained the attack and mitigated the threat.
Data exposed
Frequently asked questions
The DentaQuest data breach occurred on May 23, 2026. It was added to Have I Been Pwned's breach catalog on June 3, 2026.
2,553,599 accounts were affected by the DentaQuest data breach, according to Have I Been Pwned's records.
The DentaQuest breach exposed the following data types: Dates of birth, Email addresses, Genders, Government issued IDs, Health insurance information, Names, Phone numbers, Physical addresses.
Yes. Have I Been Pwned has verified the DentaQuest breach, meaning there's confirmed evidence the exposed data is genuine and tied to real accounts.
Use KazaSec's free Email Breach Checker (/tools/breach-check) to check whether a specific email address has surfaced in the DentaQuest breach, or any other known breach — the tool never stores what you search.
Our free Email Breach Checker tells you whether a specific email address has surfaced in this breach — or any other known breach — without ever storing what you search.
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