AccidentalHealthcareHealthcareMisconfigurationDelayed DiscoveryPIIPHIIdentity (basic)Health (basic)LowContained

McLean Hospital

bd_7da3bad6d0a8573c · schema v1 · pii pii-v1

Severity

Low

Discovered

Feb 8, 2024

Filed

May 21, 2024

To disclose

15 weeks

Affected

1state residents only

Linked

3 filings

Confidence

65%

Full breach record for McLean Hospital →13 incidents on file

McLean Hospital (Mass General Brigham) notified Montana residents that an internal mailing list archive was publicly accessible without authentication from June 15, 2020, to February 9, 2024. The incident, discovered during a vulnerability test on February 8, 2024, exposed PHI and PII including names, MRNs, DOBs, and clinical data. No SSNs or financial data were involved. The link was disabled immediately upon discovery.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 1333 days

discovery → filing · 15 weeks / 103 days

Jun 15, 2020

Begins

Feb 8, 2024

Discovered

May 21, 2024

Filed

vs. sector median

+2 wks slower

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

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_3d94e5c8e8e952872024-05-21Verified
HHS OCRbd_c98f163874820dd52024-05-21Candidate

Name: Mass General Brigham
norm: mass general brigham

Name: McLean Hospital
norm: mclean hospital
Industry: Healthcarellm

Discovered: Feb 8, 2024
Breach occurred: Jun 15, 2020 – Feb 9, 2024
Undetected for: 1,333 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 21, 2024
Affected individuals: 1state-resident count only
Data types: PIIPHIIdentity (basic)Health (basic)
Attack vector: Misconfiguration
MITRE ATT&CK: T1190 Exploit Public-Facing Application

During the incident: Disabled the link
Disabled the archiving functions
Changes made: Disabled the link
Disabled the archiving functions
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(103 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 · 2 states

View merged incident ↗

Massachusetts State AGMay 21 · first

HHS OCRMay 21 · first

Montana State AGMay 21 · first · this page

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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-1414.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 21, 2024
Raw hash: f92d0b5ad74dbdfdd63872981b5874f42da20f4856d0157bd737f8c7e3577436

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMass General Brigham

Victim entityMcLean Hospital

Incidentdiscovered Feb 8, 2024

Stated responseDisabled the link

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov