HackingHealthcareHealthcareStolen CredentialsData ExfiltratedSupply Chain (3P Vendor)Customer Data InvolvedDelayed DiscoveryPHIIdentity (basic)Government IDHealth (basic)MediumContained

Nebraska Orthopaedic Center

bd_9ddfa8bced87de0b · schema v1 · pii pii-v2

Severity

Medium

Discovered

Dec 18, 2025

Filed

Aug 1, 2026

To disclose

—

Affected

Not disclosed

Linked

5 filings

Confidence

64%

Full breach record for Nebraska Orthopaedic Center →

Nebraska Orthopaedic Center, P.C. notified patients of a data breach involving their protected health information. The incident occurred at Aesto, LLC, a third-party healthcare data migration and archiving service provider. Between December 2 and December 18, 2025, an unauthorized actor copied PHI including names, medical record numbers, dates of birth, and Social Security numbers from Aesto's AWS infrastructure. Aesto discovered the incident on December 18, 2025. The breach affected residents of Massachusetts and Rhode Island. Nebraska Orthopaedic Center is offering 24 months of credit monitoring services.

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Incident timeline

undetected · 16 days

Dec 2, 2025

Begins

Dec 18, 2025

Discovered

Aug 1, 2026

Filed

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Washington State AGbd_006679bfb3ccd1c92026-08-19 · +18dVerified
Oregon State AGbd_4750be7f8e77a00d2026-08-19 · +18dVerified
Vermont State AGbd_7cff054a53fd097f2026-08-19 · +18dVerified
California State AGbd_075703db34849ec02026-08-20 · +19dVerified

Name: Nebraska Orthopaedic Center, P.C.
norm: nebraska orthopaedic center
Domain: aestohealth.com

Name: Nebraska Orthopaedic Center
norm: nebraska orthopaedic center
Domain: nebraskaortho.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 18, 2026
Affected individuals: Not disclosed
Data types: PHIIdentity (basic)Government IDHealth (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 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 twenty-four (24) month 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
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.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Massachusetts State AGAug 1 · first · this page

Washington State AG+18d

Oregon State AG+18d

Vermont State AG+18d

California State AG+19d

Pattern: first filing Aug 1 (MA), last Aug 20 (CA) — a 19-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://www.mass.gov/doc/2026-1389-nebraska-orthopaedic-center/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 1, 2026
Raw hash: 3b0efba1af82b6bb23ea82ba4bfeac12d5cd5a66f32e486f0ad0302b00ed5791

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityNebraska Orthopaedic Center, P.C.

Victim entityNebraska Orthopaedic Center

Incidentdiscovered Dec 18, 2025

Stated responseCommenced a prompt and thorough investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov