MisuseHealthcareHealthcarePrivilege AbuseEmployee Data InvolvedTargetedPHIHealth (basic)Identity (basic)LowContained

Mass General Hospital and Brigham & Women’s Hospital

bd_98357e44834115cc · schema v1 · pii pii-v1

Severity

Low

Discovered

Jun 20, 2023

Filed

Aug 18, 2023

To disclose

8 weeks

Affected

3state residents only

Confidence

64%

Full breach record for Mass General Hospital and Brigham & Women’s Hospital →

Mass General Hospital and Brigham & Women’s Hospital notified NH AG of unauthorized EHR access by student visitors on June 14-20, 2023. Discovered June 20, 2023. Access via employee laptop. PHI and basic identity data affected. 3 NH residents notified. Access revoked, investigation completed Aug 9, 2023.

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Incident timeline

undetected · 6 days

discovery → filing · 8 weeks / 59 days

Jun 14, 2023

Begins

Jun 20, 2023

Discovered

Aug 18, 2023

Filed

vs. sector median

4 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed3 affectedView incident

Name: Mass General Hospital and Brigham & Women’s Hospital
norm: mass general hospital and brigham women s hospital

Name: Mass General Hospital and Brigham & Women’s Hospital
norm: mass general hospital and brigham women s hospital
Industry: Healthcarellm

Discovered: Jun 20, 2023
Breach occurred: Jun 14, 2023 – Jun 20, 2023
Undetected for: 6 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 18, 2023
Affected individuals: 3state-resident count only
Data types: PHIHealth (basic)Identity (basic)
Attack vector: Insider
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: Internal
Regulator citations: Notified New Hampshire Attorney General Consumer Protection Bureau
Initial access: insider_action

During the incident: Began an investigation to determine what personal information of patients may have been accessed
Conducted a comprehensive review to determine what information was accessed and to whom the information was related
Students are no longer BWH visitors and do not have access to MGH’s and BWH’s systems
Changes made: Continue to improve safeguards in place to protect their patients’ information
Promote training and education of their employees, including regarding educational visits
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(59 days from discovery to filing)
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://mm.nh.gov/files/uploads/doj/remote-docs/mass-general-hospital-brigham-womens-hospital-20230818.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 18, 2023
Raw hash: 59798548d2272f6d7d0502b83933e9a609f719114e88ed6c888227ca14882737

Reporting entityMass General Hospital and Brigham & Women’s Hospital

Victim entityMass General Hospital and Brigham & Women’s Hospital

Incidentdiscovered Jun 20, 2023

Stated responseBegan an investigation to determine what personal information of patients may have been accessed

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov