NEW YORKAccidentalHealthcareHealthcareMisconfigurationBusiness Associate (HIPAA)Customer Data InvolvedPHIHealth (basic)Identity (basic)Government IDFinancial accountHighContained

MEMORIAL SLOAN-KETTERING CANCER CENTER

bd_f3b0825a6dc1896d · schema v1 · pii pii-v1

Severity

High

Discovered

—

Filed

Mar 31, 2021

To disclose

—

Affected

18,913

Linked

2 filings

Confidence

68%

Full breach record for MEMORIAL SLOAN-KETTERING CANCER CENTER →7 incidents on file

Memorial Sloan Kettering Cancer Center reported to HHS on 2021-03-31 a Unauthorized Access/Disclosure affecting 18913 individuals. Breached information located on Network Server. Business associate employees misconfigured a server exposing PHI including names, SSNs, DOBs, addresses, financial info, diagnoses, and treatment data.

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HIPAA clock✓ HHS notified

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

⚠ No discovery dateThe OCR public portal omits the discovery date, so the 60-day notification clock cannot be evaluated from this source — only that the filing was submitted.

Incident timeline — partial

? — ?

Breach window unknown

Mar 31, 2021

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

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

Montana State AGbd_cfdfed5d5ebf622b2021-03-31Verified

Name: MEMORIAL SLOAN-KETTERING CANCER CENTER
norm: memorial sloan kettering cancer center
Domain: mskcc.org
Industry: Health Care Services

Name: MEMORIAL SLOAN-KETTERING CANCER CENTER
norm: memorial sloan kettering cancer center
Domain: mskcc.org
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 18,913nationwide
Data types: PHIHealth (basic)Identity (basic)Government IDFinancial account
HHS breach type: Unauthorized access or disclosure
Where the data lived: Network server
Covered-entity type: Healthcare providerBusiness associate involved
Attack vector: Misconfiguration
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: Internal
Regulator citations: Notified HHS

During the incident: Provided free credit monitoring and fraud protection services
Sanctioned workforce members responsible for the breach
Took the affected network server offline
Source: Quoted from the filing itself, not independently verified.

Compliance flags: HHS notified
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.
Clock breakdown: Statute Window Elapsed Threshold Status
HIPAA
Discovered: not extracted
→ Notified: not extracted
— regulatory submission HHS notified

Statute	Window	Elapsed	Threshold	Status
HIPAA	Discovered: not extracted → Notified: not extracted	—	regulatory submission	HHS notified

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Montana State AGMar 31 · first

HHS OCRMar 31 · 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://ocrportal.hhs.gov/ocr/breach/breach_report.jsf
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Mar 31, 2021
Raw hash: 3a3e1f746024deb20d67f4d5468894d6ecc96c148b88687d12b6ccb46720dc0d

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Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMEMORIAL SLOAN-KETTERING CANCER CENTER

Victim entityMEMORIAL SLOAN-KETTERING CANCER CENTER

IncidentMisconfiguration

Stated responseProvided free credit monitoring and fraud protection services

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing