Social EngineeringHealthcareFinancial ServicesHealthcarePhishingStolen CredentialsData ExfiltratedData PublishedCustomer Data InvolvedPHIIdentity (basic)Government IDHealth (basic)CriticalContained

DentaQuest, LLC

bd_698b0f815be60a92 · schema v1 · pii pii-v2

Severity

Critical

Discovered

May 20, 2026

Filed

Oct 22, 2026

To disclose

22 weeks

Affected · nationwide

439,90913 in this filing

Linked

22 records

Confidence

69%

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

DentaQuest, a dental and vision benefits provider for Humana plans, experienced a social engineering attack targeting an employee account. Unauthorized access occurred between May 17 and May 20, 2026. The threat actor accessed personal and health information, including SSNs for some individuals, for 439,909 people nationwide, including 13 New Hampshire residents. Data was exfiltrated and published online. DentaQuest contained the incident, engaged CrowdStrike, and offered 24 months of identity monitoring.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >90d22 weeks discovery → filing

Incident timeline

undetected · 3 days

discovery → filing · 22 weeks / 155 days

May 17, 2026

Begins

May 20, 2026

Discovered

Oct 22, 2026

Filed

vs. sector median

+13 wks slower

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

A leak claim by shinyhunters about this victim was first seen 147 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Massachusetts State AGbd_482378fdc49ac6952026-09-01 · +51dVerified
Idaho State AGbd_b048476c6c1e18832026-08-12 · +71dVerified
Idaho State AGbd_0510572adf88325a2026-08-03 · +80dVerified
Massachusetts State AGbd_1e8db8bfc75827d62026-07-30 · +84dVerified

Show 6 more filings ↓up to 97d gap

Idaho State AGbd_571c7231b18fedc32026-07-30 · +84dVerified
New Hampshire State AGbd_109ea4be4ea997032026-07-29 · +85dVerified
Indiana State AGbd_36b0303cd630b8522026-07-17 · +97dVerified
Texas State AGbd_4a5196edfadecf3b2026-07-17 · +97dVerified
Nebraska State AGbd_4d1ee0875da1a2ff2026-07-17 · +97dVerified
Delaware State AGbd_f990f6918f923e332026-07-17 · +97dVerified

Showing first 10 of 21 linked disclosures.

Name: DentaQuest, LLC
norm: dentaquest
Domain: humana.com

Name: DentaQuest, LLC
norm: dentaquest
Industry: HealthcarellmFinancial Servicesllm

Discovered: May 20, 2026
Breach occurred: May 17, 2026 – May 20, 2026
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 27, 2026
Affected individuals: 439,909state + nationwide
Data types: PHIIdentity (basic)Government IDHealth (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566 PhishingT1078 Valid Accounts
Threat actor: External
Regulator citations: Notified New Hampshire Insurance DepartmentNotified any applicable consumer reporting agencies and any other required agency
Initial access: phishing_link

During the incident: Engaged outside legal counsel
Retained CrowdStrike Services to conduct an independent investigation
Revoked all SSO sessions associated with the Impacted Account
Deactivated the Impacted Account and rotated associated credentials
Disabled application-specific access associated with the Impacted Account
Implemented containment measures on May 20, 2026
Sent notification letters to residents of your State who were impacted by this situation beginning August 27, 2026
Offered identity theft monitoring by Kroll at no cost to you for 24 months
Notified any applicable consumer reporting agencies and any other required agency
Reported the incident to law enforcement
Changes made: Engaged cyber security experts
Provided more employee training
Added new security measures
Increased monitoring
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 22 weeks(155 days from discovery to filing)
Compliance flags: Leak >90d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

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

New Hampshire State AG+97d · this page

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://mm.nh.gov/files/uploads/doj/remote-docs/dentaquest-20261022.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 22, 2026
Raw hash: a8a254bf9d07e92b2663928ae2dccd4a1074653cf6d939d01fff5622256aa7ad

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityDentaQuest, LLC

Victim entityDentaQuest, LLC

Incidentdiscovered May 20, 2026

Stated responseEngaged outside legal counsel

ComplianceLeak >90d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov