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Response snapshot Oct 27, 2026, 02:47 UTC

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Disclosed incidenthibp-dentaquest

DentaQuest breach: 2,553,599 accounts exposed

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.

At a glance

Sources
2 independent sources

What to do

If you or your organization used this service, change reused passwords, watch for phishing that uses the exposed data, and check the disclosure for the organization's guidance.

Read Have I Been Pwned: DentaQuest (opens a new tab)

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.

Related technology

Sources

  1. Primary source

    Have I Been Pwned: DentaQuest (opens a new tab)

    Verified breach loaded into Have I Been Pwned: account count, exposed data types, and dates.

    Published Checked

  2. Primary source

    DentaQuest disclosure (opens a new tab)

    The organization's own breach disclosure, as linked by Have I Been Pwned.

    Published Date not suppliedChecked

  3. Primary source

    Have I Been Pwned breach API (opens a new tab)

    The breach list that supplied this entry.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, June 3). DentaQuest breach: 2,553,599 accounts exposed. https://kevwire.com/record/hibp-dentaquest

MLA

"DentaQuest breach: 2,553,599 accounts exposed." KEVWire, 3 June 2026, kevwire.com/record/hibp-dentaquest.

Chicago

KEVWire. "DentaQuest breach: 2,553,599 accounts exposed." Last modified June 3, 2026. https://kevwire.com/record/hibp-dentaquest.

Evidence summary (plain text)

DentaQuest breach: 2,553,599 accounts exposed (Jun 3, 2026).
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.
Sources:
Have I Been Pwned: DentaQuest: https://haveibeenpwned.com/Breach/DentaQuest
DentaQuest disclosure: https://dentaquest.com/en/security-update-0526
Have I Been Pwned breach API: https://haveibeenpwned.com/api/v3/breaches
Record ID: hibp-dentaquest.
Record origin: Ingested record.
AI evidence: Not assessed.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 02:25 UTC. Ingestion is not an independent editorial investigation.

Verified by Have I Been Pwned. Breach date: 2026-05-23; loaded 2026-06-03. Exposed data: Dates of birth, Email addresses, Genders, Government issued IDs, Health insurance information, Names, Phone numbers, Physical addresses. Counts are accounts in the loaded data, not necessarily distinct people.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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