HackingHealthcareHealthcareData ExfiltratedData PublishedCustomer Data InvolvedPHIGovernment IDIdentity (basic)Health (basic)MediumContained

DentaQuest, LLC

bd_482378fdc49ac695 · schema v1 · pii pii-v2

Severity

Medium

Discovered

May 20, 2026

Filed

Sep 1, 2026

To disclose

—

Affected

826state residents only

Linked

22 records

Confidence

68%

Full breach record for DentaQuest, LLC →6 incidents on file

DentaQuest discovered unauthorized access to its computer network on May 20, 2026, involving data accessed between May 17 and May 20, 2026. The breach exposed personal identification information, including Social Security numbers, and dental/vision health information (PHI). The organization determined that the data was accessed and posted on the internet. DentaQuest secured the network, reported the incident to law enforcement, engaged cybersecurity experts, and is offering 24 months of identity monitoring to affected individuals.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 3 days

May 17, 2026

Begins

May 20, 2026

Discovered

Sep 1, 2026

Filed

This filing is one of 22 records about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Idaho State AGbd_b048476c6c1e18832026-08-12 · +20dVerified
Idaho State AGbd_0510572adf88325a2026-08-03 · +29dVerified
Massachusetts State AGbd_1e8db8bfc75827d62026-07-30 · +33dVerified
Idaho State AGbd_571c7231b18fedc32026-07-30 · +33dVerified

Show 6 more filings ↓up to 51d gap

New Hampshire State AGbd_109ea4be4ea997032026-07-29 · +34dVerified
Indiana State AGbd_36b0303cd630b8522026-07-17 · +46dVerified
Texas State AGbd_4a5196edfadecf3b2026-07-17 · +46dVerified
Nebraska State AGbd_4d1ee0875da1a2ff2026-07-17 · +46dVerified
Delaware State AGbd_f990f6918f923e332026-07-17 · +46dVerified
New Hampshire State AGbd_698b0f815be60a922026-10-22 · +51dVerified

Showing first 10 of 21 linked disclosures.

Name: DentaQuest, LLC
norm: dentaquest

Name: DentaQuest, LLC
norm: dentaquest
Industry: Healthcarellm

Discovered: May 20, 2026
Breach occurred: May 17, 2026 – May 20, 2026
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 826state-resident count only
Data types: PHIGovernment IDIdentity (basic)Health (basic)
Attack vector: Unknown
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 ChannelT1560 Data from Cloud Storage Object
Threat actor: External

During the incident: Took immediate action to secure the network
Reported the incident to law enforcement
Began an investigation with leading, independent cybersecurity experts
Offering identity monitoring by Kroll at no cost for 24 months
Changes made: Engaged cybersecurity experts
Provided more employee training
Added new security measures
Increased monitoring
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 7 states

View merged incident ↗

Indiana State AGJul 17 · first

Texas State AGJul 17 · first

Nebraska State AGJul 17 · first

Delaware State AGJul 17 · first

New Hampshire State AG+12d

Massachusetts State AG+13d

Idaho State AG+13d

Idaho State AG+17d

Idaho State AG+26d

Massachusetts State AG+46d · this page

New Hampshire State AG+97d

Pattern: first filing Jul 17 (IN), last Oct 22 (NH) — a 97-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 21 — the full spread may be wider.

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.mass.gov/doc/2026-1607-caresource-commonwealth-care-alliance/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 1, 2026
Raw hash: 50f66afd9ce8eb6d8359d2f8e15518bad154d7ea0bb668a2f5fec21d438136d4

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityDentaQuest, LLC

Victim entityDentaQuest, LLC

Incidentdiscovered May 20, 2026

Stated responseTook immediate action to secure the network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov