DentaQuest Data Breach Exposes 2.6 Million Accounts
Dental benefits administrator DentaQuest confirmed a cybersecurity incident involving unauthorized access to a portion of its network, leading to the exposure of personal and health-related information for 2.6 million individuals. The ShinyHunters extortion group claimed responsibility and leaked the data.
Dentaquest
- Domain
- dentaquest.com
- Sector
- Health Care and Social Assistance
- Signals
- 1 linked
Signal context
First seen: Jun 2, 2026
Last updated: Jun 19, 2026
Status: Public signal
Key points
- DentaQuest confirmed the incident on June 2, 2026.
- ShinyHunters extortion group claimed responsibility and leaked over 234GB of stolen data.
- Exposed data included names, email addresses, phone numbers, physical addresses, dates of birth, government-issued IDs (including Medicaid IDs), and health insurance information.
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: Health Care and Social Assistance
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
- 6 signals in the same sector
- 22 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
Related signals
Grouped by why the signal is relevant.
Horizon Family Medical Group Data Breach
Reports emerged on June 18, 2026, of a possible data breach at Horizon Family Medical Group, a medical provider in New York's Hudson Valley region. Threat actor Incransom claimed to have stolen 7 TB of data, including medical information such as diagnoses, prescriptions, treatments, and lab results.
Council of Europe Hacked by ShinyHunters, 297 GB of Data Stolen
The notorious extortion group ShinyHunters claimed to have hacked the Council of Europe, stealing nearly 300 gigabytes of data, including employee personal information, payroll data, CVs, and medical records. The group threatened to leak the data if negotiations were not initiated.
iRhythm Holdings Discloses Cybersecurity Incident and Data Breach
iRhythm Holdings, a heart monitoring device manufacturer, identified unauthorized access to certain third-party-hosted business applications, leading to the exfiltration of sensitive patient and proprietary data. The company received an extortion demand from a threat actor.
Oracle Health (Cerner) Legacy Server Breach
In a separate incident from the Oracle Cloud breach, Oracle Health (formerly Cerner), a provider of electronic health record (EHR) systems, experienced a data breach. A hacker reportedly used stolen credentials to access legacy servers that had not yet been migrated to Oracle Cloud, leading to the exfiltration of healthcare records from various hospitals in the United States. The incident began on January 22, 2025, and Oracle first noticed the breach on February 20, 2025. The attacker is allegedly extorting Oracle Health customers, demanding cryptocurrency payments to withhold publishing the stolen data, which likely includes protected health information.
Oracle Affected by FortiBleed Campaign
Oracle was identified as one of over 22,000 corporate domains affected by the FortiBleed campaign. A Russian-speaking criminal group compromised Fortinet firewall and VPN devices globally, exfiltrating credentials and potentially gaining full network access.
Paywall Bypass Vulnerability
Tweakers.net has identified a vulnerability that allows for the bypass of its paywall. This issue is listed as a 'Known issue' within their bug bounty program, indicating that the company is aware of the flaw and is seeking ethical hackers to report findings related to it. A successful bypass could allow unauthorized access to premium content.