Contained High impact Data breach Checked 15h ago

DentaQuest breach exposes data of 15 million people

DentaQuest, a major US dental and vision benefits administrator, says hackers accessed its network from May 17 to May 20, 2026. The company notified more than 15 million people whose Social Security numbers, government ID and health information were exposed. A proposed class action filed on August 21 alleges DentaQuest failed to protect the data. The claims have not been decided.

Started
May 17, 2026
Latest activity
Aug 21, 2026
Attributed to
Not named publiclySuspected
Where
United States
Sectors
Healthcare
Scale
one company, more than 15 million affected individuals

Current status

A September 8 report repeated the existing lawsuit and reported no new attacker activity or official closure.

Contained: The attack has been stopped or blocked. Recovery and investigation are still running.

Who is behind it

DentaQuest has not named an attacker; a group calling itself ShinyHunters claimed to have leaked related DentaQuest data separately, but this has not been confirmed by the company.

Impact

Attackers accessed DentaQuest's network for several days in May 2026 and stole personal and health data including Social Security numbers, government ID numbers, and dental or vision health records.

What to do

If you get a notice from DentaQuest, enroll in the free credit monitoring it is offering and watch your credit reports and insurance statements for anything you do not recognize.

Timeline

  1. Aug 21, 2026

    Amanda Whitlow filed a proposed class action against DentaQuest Group Inc. and DentaQuest LLC over the breach. The allegations have not been decided.

    Containeddockets.justia.com
  2. Aug 12, 2026

    DentaQuest reported more than 15 million affected individuals to federal regulators and began sending notification letters.

    Containedtechrepublic.com
  3. May 20, 2026

    DentaQuest discovered unauthorized access to its network that had occurred from May 17 to May 20, 2026.

    Containedesecurityplanet.com

Sources