DentaQuest

Medium

Data breach — May 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.

2.6M

Records exposed

2026

Year

Data types

Free

To check

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Quick answer — was DentaQuest breached?

Yes. DentaQuest was breached in May 2026, exposing 2,553,599 records including dates of birth, email addresses, genders. This breach has been independently verified. If your email was involved, your data may still be at risk today. Check if you were affected.

What happened in the DentaQuest data breach?

The exposed data included 8 types of personal information. Learn more about what a data breach means for you.

Why was the DentaQuest breach so dangerous?

The DentaQuest breach exposed 2,553,599 records — 2.6M people whose personal data is now circulating in criminal markets.

Don't wait to find out — check if your email was exposed in this breach.

What data was stolen in the DentaQuest breach?

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

Dates of birth — used to verify identity for account takeover and fraud

Email addresses — used for phishing attacks and credential stuffing against your other accounts

Genders — may be combined with other breach data to build a profile for targeted attacks

Government issued IDs — enables full identity theft including fraudulent credit applications

Health insurance information — may be combined with other breach data to build a profile for targeted attacks

Names — used to build profiles and target you with personalised scams

Phone numbers — enables SIM-swapping attacks and targeted SMS phishing

Physical addresses — combined with other data, used for identity theft and physical fraud

Is the DentaQuest breach still dangerous in 2026?

Yes. Stolen data from the DentaQuest breach remains dangerous years after the incident. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2026 are still actively used in automated attacks today.

Personal information like email addresses, phone numbers, and dates of birth does not expire. Even if you changed your DentaQuest password, the other exposed data can be combined with information from other breaches to target you. Learn how long stolen data stays dangerous.

What to do if your email was in the DentaQuest breach

Change your DentaQuest password immediately

Log into DentaQuest and change your password to something strong and unique — one you have never used anywhere else.

Change any account sharing that password

If you reused this password elsewhere, change it on every affected account. Attackers test stolen credentials against hundreds of popular sites within hours.

Enable two-factor authentication

Turn on 2FA on DentaQuest and every important account. Even if your password is known, attackers cannot access the account without the second factor.

Check your other accounts for this breach

Run a full email scan to see every breach your address appears in — not just this one.

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Frequently asked about the DentaQuest breach

How many people were affected by the DentaQuest data breach?

Approximately 2,553,599 user records were exposed in the DentaQuest breach in May 2026.

Is the DentaQuest breach still a risk in 2026?

Yes. Leaked credentials are actively used in credential-stuffing attacks years after a breach. If you reused your DentaQuest password elsewhere and have not changed it, those accounts remain at risk today.

How do I check if my email was in the DentaQuest breach?

Enter your email in the free checker on EmailLeaked. We scan millions of breach records including the DentaQuest dataset and tell you instantly whether your email was exposed and what data was taken.

What should I do if I was in the DentaQuest breach?

Change your DentaQuest password immediately, update any account where you used the same password, enable two-factor authentication on all important accounts, and monitor for phishing emails over the next 90 days.

How this breach page is reviewed

Breach pages are built from structured breach records and reviewed for practical risk guidance by EmailLeaked. Risk labels reflect exposed data types and are intended to help readers prioritise action.

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