DentaQuest data breach
2,553,599 accounts exposed.
Check whether your email is included on Have I Been Pwned.
What was exposed
What to do
- Expect more phishing emails that mention this service. Do not click links in them; go to the site directly.
- Be wary of texts and calls that seem to know your details.
- Consider a credit freeze or fraud alert with the credit agencies in your country.
- Turn on two-step verification wherever it is offered, and use a password manager.
About this breach
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.