UnknownGovernment IDFinancial accountMedium

21c Museum Hotels

bd_fb66644c061e1623 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Sep 17, 2021

To disclose

—

Affected

6state residents only

Confidence

95%

Full breach record for 21c Museum Hotels →6 incidents on file

21c Museum Hotels reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2021-09-17. 6 Massachusetts residents were affected. The report records the breach type as electronic.

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Massachusetts clock✓ MA credit monitoring due

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

Incident timeline — partial

? — ?

Breach window unknown

Sep 17, 2021

Filed

—

No filing yet · watching

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

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed6 affectedView incident

Name: 21c Museum Hotels
norm: 21c museum hotels
Domain: 21cmuseumhotels.com

Name: 21c Museum Hotels
norm: 21c museum hotels
Domain: 21cmuseumhotels.com

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 6state-resident count only
Data types: Government IDFinancial account
Data elements: Social Security numberFinancial account number
Stated not affected: Driver's licence numberPayment card number
The filing states these were not involved. Categories absent from both lists were not addressed either way.
Attack vector: Unknown
Threat actor: External

Compliance flags: MA credit monitoring due
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

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/data-breach-report-2021/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 17, 2021
Raw hash: 3c6233d3132803ab210b5d61bddfc4e5cc9254a2df2a9407ba67dc73f9fc503d

Reporting entity21c Museum Hotels

Victim entity21c Museum Hotels

IncidentUnknown

ComplianceMA credit monitoring due

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov