DentaQuest Data Breach

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.

When did it happen?

The breach date in the public record is May 23, 2026. The record was added to the catalogue on June 3, 2026 and last updated there on June 3, 2026.

What information was reported as exposed?

• Dates of birth
• Email addresses
• Genders
• Government issued IDs
• Health insurance information
• Names
• Phone numbers
• Physical addresses

These are incident-level categories. The record does not prove that every category was exposed for every affected person.

Who may be affected?

This record may be relevant to people who had an account or other relationship with DentaQuest or used dentaquest.com around May 23, 2026. A catalogue entry does not establish that every customer was affected or that every listed data category applied to each person. Compare the record with an official notice addressed to you.

What should you do?

Choose actions that match the information involved. If you find signs that someone is using your identity, the Federal Trade Commission provides a personal recovery plan at IdentityTheft.gov.