UnknownEducationEducationGovernment IDMedium

Riverdale Country School, Inc.

bd_0d30d2b140332eea · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Jun 30, 2025

To disclose

—

Affected

1state residents only

Linked

4 filings

Confidence

95%

Full breach record for Riverdale Country School, Inc. →

Riverdale Country School, Inc. reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2025-06-30. 1 Massachusetts residents were affected.

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Leak gap clock⏱ Leak >90d

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

Incident timeline — partial

? — ?

Breach window unknown

Jun 30, 2025

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 4 about the same incident.View merged incident

A leak claim by ransomhub about this victim predates this filing by 145 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (2)

Leak Siteransomhubbd_83b025fabf204e1e2025-02-07 · +143dVerified by operator
Leak Siteransomhubbd_ca330bcf1d25afe12025-02-05 · +145dVerified by operator

Regulatory filings (1) · sorted by filing gap

Maine State AGbd_2ec0f59d35cdb6f62025-06-30Candidate

Name: Riverdale Country School, Inc.
norm: riverdale country school
Domain: riverdale.edu

Name: Riverdale Country School, Inc.
norm: riverdale country school
Domain: riverdale.edu
Industry: Educationregulator portal

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: Government ID
Data elements: Social Security number
Stated not affected: Medical informationFinancial account numberDriver'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

Compliance flags: Leak >90dMA 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.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Maine State AGJun 30 · first

Massachusetts State AGJun 30 · 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://www.mass.gov/doc/data-breach-report-2025/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 30, 2025
Raw hash: b39cfb71045b62ccdb9dcbf15cd376256830eb4c5c766449c03700bfa366887b

Linked disclosures

Ransomware claims (2)

Regulatory filings (1) · sorted by filing gap

Reporting entityRiverdale Country School, Inc.

Victim entityRiverdale Country School, Inc.

IncidentUnknown

ComplianceLeak >90d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov