DentaQuest data breach
2,553,599 accounts exposed in a breach on 23 May 2026.
At a glance
2,553,599
Accounts exposed
23 May 2026
Date of the breach
3 June 2026
Added to the list
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 tra
What was exposed
- Dates of birth. Dates of birth were exposed. They help criminals prove they are you, and they cannot be changed.
- Email addresses. Email addresses were exposed. Expect more spam and phishing aimed at those addresses.
- Genders. Genders were exposed. On its own it is low risk, but it adds to a profile of you.
- Government issued IDs. Government identity details were exposed. Identity theft is the main risk, so contact the issuer of the document.
- Health insurance information. Health insurance details were exposed. Tell your insurer if you see claims you did not make.
- Names. Names were exposed. Scammers use real names to make a message look personal.
- Phone numbers. Phone numbers were exposed. Expect scam calls and text messages, some of them pretending to be the organisation.
- Physical addresses. Home or postal addresses were exposed. They can be used to make a scam letter or a fake identity look real.
What to do now
It depends on what was exposed, so these steps follow the list above.
If identity documents or numbers were exposed
- Contact the organisation that issued the document (for example the passport office or the licensing authority) and ask what to do.
- Contact your national identity theft or cyber support service for help with identity theft (for example IDCARE in Australia and New Zealand).
- Watch for credit enquiries or accounts you did not open.
If health details were exposed
- Be careful with messages that mention your health or your provider. Scammers use these details to sound genuine.
- Ask the organisation what it is doing, and tell your health provider if you see anything you did not do.
If your contact details were exposed
- Expect more spam, scam calls and phishing. Do not click links or open attachments in messages you did not expect.
- If a message mentions this breach, do not reply. Go to the organisation's own website or app instead of using a link in the message.
Whatever was exposed
- Check which other breaches include your own email address and phone number.
- Keep an eye on your accounts for a few months. Breached data is often used long after the breach.
- If you think someone is using your details, report it to the organisation and to your national cyber crime reporting service.
Check your own exposure
- Password leak check: find out whether a password has appeared in a breach. The password never leaves your browser.
- Free domain security scan: grade the email, DNS and website security of a domain you own.
Related breaches
Other breaches that exposed some of the same kinds of data.
Sharecare
In August 2026, the digital health company Sharecare was the target of a ShinyHunters "pay or leak" extortion campaign.
- Dates of birth
- Email addresses
- Employers
- Genders
- +6 more
Read what happened
Glendale Community College
In June 2026, Glendale Community College was the target of a ShinyHunters "pay or leak" extortion campaign.
- Academic records
- Dates of birth
- Email addresses
- Genders
- +4 more
Read what happened
Odido
In February 2026, Dutch telco Odido was the victim of a data breach and subsequent extortion attempt.
- Bank account numbers
- Customer service records
- Dates of birth
- Driver's licenses
- +7 more
Read what happened