HackingHealthcareHealthcareSupply Chain (3P Vendor)Customer Data InvolvedDelayed DiscoveryPHIGovernment IDIdentity (basic)Health (basic)MediumContained

Graham County Hospital

bd_6f94ad8afcd0294b · schema v1 · pii pii-v2

Severity

Medium

Discovered

Jun 26, 2026

Filed

Sep 11, 2026

To disclose

11 weeks

Affected

1state residents only

Linked

2 filings

Confidence

70%

Full breach record for Graham County Hospital →

Graham County Hospital notified the NH Attorney General of a data security incident involving its third-party vendor, Aesto, LLC. Unauthorized access to patient data occurred between December 2 and December 18, 2025. GCH became aware of the incident on June 26, 2026. One New Hampshire resident was affected, with potential exposure of name, date of birth, and Social Security Number. GCH offered 12 months of credit monitoring.

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Incident timeline

undetected · 206 days

discovery → filing · 11 weeks / 77 days

Dec 2, 2025

Begins

Jun 26, 2026

Discovered

Sep 11, 2026

Filed

vs. sector median

1 wks faster

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

Massachusetts State AGbd_552342ca92f193182026-09-01 · +10dCandidate

Name: Graham County Hospital
norm: graham county hospital
Domain: wilsonelser.com

Name: Graham County Hospital
norm: graham county hospital
Industry: Healthcarellm

Discovered: Jun 26, 2026
Breach occurred: Dec 2, 2025 – Dec 18, 2025
Undetected for: 206 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 14, 2026
Affected individuals: 1state-resident count only
Data types: PHIGovernment IDIdentity (basic)Health (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified New Hampshire Attorney GeneralAesto provided regulatory notice to the Department of Health and Human Services on behalf of affected organizations
Third party: via Aesto, LLC

During the incident: Engaged legal counsel to help assess the situation
Requested additional information from Aesto
Provided individual notice to impacted individuals
Offered complimentary credit monitoring and identity theft protection services by Haystack for a period of twelve (12) months
Highlighted steps that individuals can take to protect themselves including actively monitoring their financial accounts and statements, requesting a free credit report, and placing a fraud alert or security freeze on their credit reports
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(77 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGSep 1 · first

New Hampshire State AG+10d · this page

Pattern: first filing Sep 1 (MA), last Sep 11 (NH) — a 10-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/graham-county-hospital-20260911.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 11, 2026
Raw hash: 674b5fc7ca5bb523478fc62c87be659510e04f04a4ddfcd07f63de3ab7ba3ee0

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityGraham County Hospital

Victim entityGraham County Hospital

Incidentdiscovered Jun 26, 2026

Stated responseEngaged legal counsel to help assess the situation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov