DentaQuest Data Breach: ShinyHunters Threatens to Leak Data, Company Confirms Investigation
DentaQuest, a major U.S. dental and vision insurance provider, was reportedly hit by a data breach, with cybercriminal group ShinyHunters claiming responsibility. ShinyHunters threatened to release stolen information on May 27, 2026, after failed ransom negotiations. DentaQuest confirmed a cybersecurity incident involving unauthorized access to a portion of its network and initiated an investigation. The leaked data, reportedly over 234 GB, included 2.6 million unique email addresses, names, addresses, phone numbers, government-issued IDs, health insurance information, genders, and dates of birth.
Signal context
First seen: May 27, 2026
Last updated: Jun 25, 2026
Status: Public signal
Key points
- ShinyHunters claimed responsibility for a cyberattack on DentaQuest.
- Threat to release stolen data on May 27, 2026, after failed ransom negotiations.
- DentaQuest confirmed a cybersecurity incident and launched an investigation.
Signal analysis
BetaThis analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Sector: Finance and Insurance
Likely country: Location not provided
Watch internet-facing systems, credential abuse and exploit activity.
- Source type: outside the affected organization
Impact area: Confidentiality
Likely asset: User or customer data
- 21 signals in the same sector
- 90 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
DentaQuest Data Breach Reported; Attorneys Investigating - Class Action Lawsuitshttps://www.classaction.org/data-breach-lawsuits/dentaquest-may-2026Public source from classaction.org.
DentaQuest Data Breach - Have I Been Pwnedhttps://haveibeenpwned.com/Breach/DentaQuestPublic source from haveibeenpwned.com.
Related signals
Grouped by why the signal is relevant.
DentaQuest Data Breach by ShinyHunters Affects 2.6 Million Accounts
Dental benefits administrator DentaQuest, a subsidiary of Sun Life, suffered a data breach with threat group ShinyHunters leaking exfiltrated data. Disclosed on June 8, 2026, the incident exposed approximately 2.6 million accounts, including names, emails, government IDs, and health insurance details.
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Risk Strategies (officially RSC Insurance Brokerage Inc.), an insurance brokerage and risk management firm, disclosed a data breach on June 26, 2026. The incident involved sensitive personal and medical information, with a report submitted to the Massachusetts Office of Consumer Affairs and Business Regulation on June 23, 2026. The exposed data included names, Social Security numbers, and for some individuals, medical information, medical records, and health, dental, or vision insurance details. At least 47 Massachusetts residents were affected.
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Trenitalia, the Italian state-owned railway company, notified customers on June 26, 2026, about a cyberattack that led to unauthorized access of personal data related to travel tickets. The company detected the incident through internal checks and attributed it to 'unidentified external parties.' The attack itself reportedly occurred in November 2025. Compromised data included demographic and identification details, contact information, travel specifics, and loyalty card numbers, but no payment information or account credentials were affected.