HackingHealthcareHealthcareData ExfiltratedSupply Chain (3P Vendor)Business Associate (HIPAA)Customer Data InvolvedDelayed DiscoveryHealth (basic)Identity (basic)Government IDPHIMediumContained

University Surgical Associates

bd_03da71f3e87ff0c2 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Jun 26, 2026

Filed

Aug 1, 2026

To disclose

—

Affected

29state residents only

Confidence

64%

Full breach record for University Surgical Associates →2 incidents on file

University Surgical Associates, PLLC notified patients that their protected health information (PHI) may have been accessed by an unauthorized actor due to a network security incident at their third-party vendor, Aesto, LLC. The incident occurred between December 2 and December 18, 2025, and was discovered on December 18, 2025. Aesto confirmed the access after a forensic investigation. Affected data includes full names and other PHI. Aesto is offering credit monitoring services.

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Incident timeline

undetected · 206 days

Dec 2, 2025

Begins

Jun 26, 2026

Discovered

Aug 1, 2026

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed29 affectedView incident

Name: University Surgical Associates
norm: university surgical associates
Domain: universitysurgical.com

Name: University Surgical Associates
norm: university surgical associates
Domain: universitysurgical.com
Industry: Healthcarellm

Discovered: Jun 26, 2026
Breach occurred: Dec 2, 2025 – Dec 18, 2025
Undetected for: 206 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 24, 2026
Affected individuals: 29state-resident count only
Data types: Health (basic)Identity (basic)Government IDPHI
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 closely with external cybersecurity professionals
Conducted extensive forensic investigation and manual document review
Notified University Surgical Associates, PLLC of the incident
Offering complimentary access to Experian IdentityWorks for 12/24 months
Set up a dedicated and confidential toll-free response line
Changes made: Continually evaluate and modify practices and internal controls to enhance security and privacy
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.

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/2026-1417-university-surgical-associates-pllc/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: a1f76ea76b11b0eefafefbd20502697ed558dc35796858e6dd801b1dfb347b11

Reporting entityUniversity Surgical Associates

Victim entityUniversity Surgical Associates

Incidentdiscovered Jun 26, 2026

Stated responseCommenced a prompt and thorough investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov