UnknownFinancial ServicesFinancePCIFinancial accountLow

Mutual One Bank

bd_b66431e1e356f710 · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Jul 11, 2025

To disclose

—

Affected

1state residents only

Linked

3 filings

Confidence

95%

Full breach record for Mutual One Bank →373 incidents on file

Mutual One Bank reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2025-07-11. 1 Massachusetts residents were affected.

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Incident timeline — partial

? — ?

Breach window unknown

Jul 11, 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 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_2b666091e5db647c2025-07-11Candidate
Massachusetts State AGbd_45fa04cb420eaf672025-07-11Candidate

Name: Mutual One Bank
norm: mutual one bank

Name: Mutual One Bank
norm: mutual one bank
Industry: Financial Servicesregulator portal

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: PCI
Data elements: Payment card number
Stated not affected: Social Security numberMedical informationFinancial 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: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings

View merged incident ↗

Massachusetts State AGJul 11 · first

Massachusetts State AGJul 11 · 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: Jul 11, 2025
Raw hash: 76bb6136e763e6b8d0b915dd5b56de3048e4731360c2ce342fedb0966f86ada9

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMutual One Bank

Victim entityMutual One Bank

IncidentUnknown

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov