HackingHealthcareHealthcareData ExfiltratedSupply Chain (3P Vendor)Business Associate (HIPAA)Customer Data InvolvedDelayed DiscoveryPHIHealth (basic)Identity (basic)LowContained

Community Health Center, Inc.

bd_ea23cc71e1a3a193 · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 18, 2025

Filed

Aug 10, 2026

To disclose

34 weeks

Affected

1state residents only

Linked

2 filings

Confidence

63%

Full breach record for Community Health Center, Inc. →5 incidents on file

Midtown Community Health Center notified patients of a data breach involving their third-party vendor, Aesto, LLC. An unauthorized actor copied protected health information (PHI) and basic identity data from Aesto's AWS infrastructure between December 2 and December 18, 2025. The incident was discovered on December 18, 2025. Forensic investigation confirmed data exfiltration. Midtown is offering credit monitoring services to affected individuals.

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Massachusetts clock✗ MA AG >90d34 weeks discovery → filing

Incident timeline

undetected · 16 days

discovery → filing · 34 weeks / 235 days

Dec 2, 2025

Begins

Dec 18, 2025

Discovered

Aug 10, 2026

Filed

vs. sector median

+23 wks slower

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Vermont State AGbd_c99d421a32f5b14c2026-08-10Candidate

Name: Midtown Community Health Center, Inc
norm: midtown community health center
Domain: aestohealth.com

Name: Community Health Center, Inc.
norm: community health center
Domain: chc1.com
Industry: Healthcarellm

Discovered: Dec 18, 2025
Breach occurred: Dec 2, 2025 – Dec 18, 2025
Undetected for: 16 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 10, 2026
Affected individuals: 1state-resident count only
Data types: PHIHealth (basic)Identity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1041 Exfiltration Over C2 Channel
Threat actor: External
Third party: via Aesto, LLC

During the incident: Commenced a prompt and thorough investigation
Worked very closely with external cybersecurity professionals experienced in handling these types of incidents
Conducted extensive forensic investigation and manual document review
Offering a complimentary months membership of Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Set up a dedicated and confidential toll-free response line to respond to questions
Changes made: Continually evaluate and modify practices and internal controls to enhance the security and privacy of personal information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 34 weeks(235 days from discovery to filing)
Compliance flags: MA AG >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 · 2 filings · 2 states

View merged incident ↗

Vermont State AGAug 10 · first

Massachusetts State AGAug 10 · first · this page

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/2026-1322-midtown-community-health-center-inc/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 10, 2026
Raw hash: 723c6fa768b4d20628586127d5e0cd928d46c87b0c09a1b1011539310d248374

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMidtown Community Health Center, Inc

Victim entityCommunity Health Center, Inc.

Incidentdiscovered Dec 18, 2025

Stated responseCommenced a prompt and thorough investigation

ComplianceMA AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov