HackingHealthcareHealthcareStolen CredentialsSupply Chain (3P Vendor)Business Associate (HIPAA)Customer Data InvolvedDelayed DiscoveryPHIIdentity (basic)Government IDMediumContained

Monroe County Health Center

bd_4bc50661730b54d2 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Aug 7, 2026

Filed

Sep 2, 2026

To disclose

26 days

Affected

1state residents only

Linked

3 filings

Confidence

69%

Full breach record for Monroe County Health Center →2 incidents on file

Monroe Health Center notified the NH Attorney General that its third-party vendor, Aesto, experienced a security incident affecting AWS infrastructure. Unauthorized access occurred between Dec 2, 2025, and Dec 18, 2025. Monroe Health Center was notified on Aug 7, 2026. One New Hampshire resident's PHI, including name, demographics, and SSN, was potentially accessed. Aesto engaged GuidePoint Security for investigation and remediation, including closing security gaps and rotating secrets. Credit monitoring is offered to the affected individual.

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Incident timeline

undetected · 248 days

discovery → filing · 26 days

Dec 2, 2025

Begins

Aug 7, 2026

Discovered

Sep 2, 2026

Filed

vs. sector median

5 wks faster

This filing is one of 3 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_3945750ec5f3621d2026-08-07 · +26dCandidate
Indiana State AGbd_665745faf34541372026-08-06 · +27dVerified

Name: Monroe County Health Center
norm: monroe county health center

Name: Monroe County Health Center
norm: monroe county health center
Industry: Healthcarellm

Discovered: Aug 7, 2026
Breach occurred: Dec 2, 2025 – Dec 18, 2025
Undetected for: 248 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: PHIIdentity (basic)Government ID
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid AccountsT1195 Supply Chain Compromise
Threat actor: External
Regulator citations: Notified New Hampshire Department of Justice Office of the Attorney General
Third party: via Aesto
Initial access: supply_chain

During the incident: Commenced a prompt and thorough investigation
Worked very closely with external cybersecurity professionals experienced in handling these types of incidents
Engaged GuidePoint Security, LLC to perform Incident Response services
Notified Covered Entities with impacted information of the incident
Offering a complimentary 24 month membership of Experian
Changes made: Closed the security gaps exploited by the threat actor to gain access to the network
Deleted the impacted Lambda functions
Rotated all impacted AWS secrets
Deleted unauthorized files uploaded by the threat actor
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 26 days(26 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Indiana State AGAug 6 · first

Massachusetts State AG+1d

New Hampshire State AG+27d · this page

Pattern: first filing Aug 6 (IN), last Sep 2 (NH) — a 27-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/monroe-health-center-20260902.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 2, 2026
Raw hash: edf6982226b9b030bd7d32da7e502a5f946a4e26551e8c9c95c0303adc98afa2

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMonroe County Health Center

Victim entityMonroe County Health Center

Incidentdiscovered Aug 7, 2026

Stated responseCommenced a prompt and thorough investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov