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DentaQuest Cyberattack Tied to 2.6M Exposed Accounts

ID: 675989ed-4a6b-5899-b879-eeb25232d3a1

STIX ID: report--675989ed-4a6b-5899-b879-eeb25232d3a1

Feed Name: TechRepublic Security

Threat Score
75/100

Date Published: 2026-06-05

Date Updated: 2026-07-20

Author: Kezia Jungco

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DentaQuest reported unauthorized access to a limited portion of its network after the threat actor ShinyHunters posted a listing and allegedly leaked ~234 GB of data; Have I Been Pwned noted about 2.6 million unique email addresses and other PII/health insurance data appeared in the dump. The company says systems remain operational and is working with forensic investigators and law enforcement, but has not confirmed the full scope or exact number of affected individuals.

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