UnknownGovernment IDPCIFinancial accountMedium

Montrose Environmental Group, Inc

bd_12626356b872f3a9 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Sep 6, 2022

To disclose

—

Affected

3state residents only

Linked

4 filings

Confidence

95%

Full breach record for Montrose Environmental Group, Inc →

Montrose Environmental Group, Inc. reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2022-09-06. 3 Massachusetts residents were affected. The report records the breach type as electronic.

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Leak gap clock⏱ Leak >30d

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

Incident timeline — partial

? — ?

Breach window unknown

Sep 6, 2022

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 black_basta about this victim predates this filing by 31 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteblack_bastabd_54a7efa529034e1e2022-08-06 · +31dVerified by operator

Regulatory filings (2) · sorted by filing gap

Maine State AGbd_42ac8acf41f1dc5a2022-09-06Verified
Montana State AGbd_9a97127a2612bae82022-09-06Verified by operator

Name: Montrose Environmental Group, Inc
norm: montrose environmental

Name: Montrose Environmental Group, Inc
norm: montrose environmental

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 3state-resident count only
Data types: Government IDPCI
Data elements: Social Security numberPayment card number
Stated not affected: Financial account numberDriver's licence number
The filing states these were not involved. Categories absent from both lists were not addressed either way.
Attack vector: Unknown

Compliance flags: Leak >30dMA 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 · 3 filings · 3 states

View merged incident ↗

Maine State AGSep 6 · first

Montana State AGSep 6 · first

Massachusetts State AGSep 6 · 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-2022/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 6, 2022
Raw hash: f414206b40abd60619c2331bc64d49aab461b1e4501eff35841ad4b8f1316fe8

Linked disclosures

Ransomware claims (1)

Regulatory filings (2) · sorted by filing gap

Reporting entityMontrose Environmental Group, Inc

Victim entityMontrose Environmental Group, Inc

IncidentUnknown

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov