HackingHealthcareFinancial ServicesHealthcarePhishingStolen CredentialsData ExfiltratedData PublishedCustomer Data InvolvedDelayed DiscoveryMulti-Stage ChainIdentity (basic)Government IDHealth (basic)CriticalContained

DentaQuest, LLC

bd_109ea4be4ea99703 · schema v1 · pii pii-v1

Severity

Critical

Discovered

May 20, 2026

Filed

Jul 29, 2026

To disclose

10 weeks

Affected · nationwide

189,4925 in this filing

Linked

19 filings

Confidence

66%

Full breach record for DentaQuest, LLC →5 incidents on file

DentaQuest, LLC, a dental and vision benefits provider for Humana Medicaid and D-SNP plans, reported a cybersecurity incident to the New Hampshire Attorney General on July 29, 2026. This is a supplemental notice to a prior filing from July 17, 2026. The breach involved unauthorized access via a social engineering attack targeting a single employee's SSO credentials. The incident occurred between May 17 and May 20, 2026. Data exposed includes names, addresses, SSNs, Medicaid/Medicare numbers, and dental/vision health information. 189,492 individuals were affected nationwide, including 5 in New Hampshire. The threat actor posted data on the internet. DentaQuest engaged CrowdStrike, revoked access, and offered 24 months of Kroll identity monitoring.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >30d10 weeks discovery → filing

Incident timeline

undetected · 3 days

discovery → filing · 10 weeks / 70 days

May 17, 2026

Begins

May 20, 2026

Discovered

Jul 29, 2026

Filed

vs. sector median

3 wks faster

This filing is one of 19 about the same incident.View merged incident

A leak claim by shinyhunters about this victim predates this filing by 62 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Massachusetts State AGbd_1e8db8bfc75827d62026-07-30 · +1dVerified
Idaho State AGbd_571c7231b18fedc32026-07-30 · +1dVerified
Idaho State AGbd_0510572adf88325a2026-08-03 · +5dVerified
Texas State AGbd_4a5196edfadecf3b2026-07-17 · +12dVerified

Show 6 more filings ↓up to 14d gap

Nebraska State AGbd_4d1ee0875da1a2ff2026-07-17 · +12dVerified
Delaware State AGbd_f990f6918f923e332026-07-17 · +12dVerified
Rhode Island State AGbd_1133bd1e67e874152026-07-16 · +13dVerified
Washington State AGbd_36645eac8bc688a62026-07-16 · +13dVerified
California State AGbd_3bc7925dd29517192026-07-16 · +13dVerified
Idaho State AGbd_b048476c6c1e18832026-08-12 · +14dVerified

Showing first 10 of 18 linked disclosures.

Name: HUMANA INC.
norm: humana
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: —
Affected individuals: 189,492state + nationwide
Data types: Identity (basic)Government IDHealth (basic)
Data elements: Social Security numberMedical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Attorney General's Office
Initial access: phishing_link

During the incident: Engaged 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
Sent notification letters to residents of your State
Notified applicable consumer reporting agencies
Changes made: Provided more employee training
Added new security measures
Increased monitoring
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(70 days from discovery to filing)
Compliance flags: Leak >30d
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 · 9 states

View merged incident ↗

Rhode Island State AGJul 16 · first

Washington State AGJul 16 · first

California State AGJul 16 · first

Texas State AG+1d

Nebraska State AG+1d

Delaware State AG+1d

New Hampshire State AG+13d · this page

Massachusetts State AG+14d

Idaho State AG+14d

Idaho State AG+18d

Idaho State AG+27d

Pattern: first filing Jul 16 (RI), last Aug 12 (ID) — a 27-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 18 — 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-20260729.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 29, 2026
Raw hash: 05eb527af08d4d6390055282ab4f91a0fee7f7bdabeb2d31b4193f78d5e1c063

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityHUMANA INC.

Victim entityDentaQuest, LLC

Incidentdiscovered May 20, 2026

Stated responseEngaged CrowdStrike Services to conduct an independent investigation

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov