UnknownPCIFinancial accountLow

Mutual One Bank

bd_36e6b0105c7d2c13 · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Nov 10, 2023

To disclose

—

Affected

1state residents only

Linked

20 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 2023-11-10. 1 Massachusetts residents were affected. The report records the breach type as electronic.

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Incident timeline — partial

? — ?

Breach window unknown

Nov 10, 2023

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 20 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Massachusetts State AGbd_216b0108e990cf4e2023-11-15 · +5dCandidate
Massachusetts State AGbd_26535ed956fccd772023-11-15 · +5dCandidate
Massachusetts State AGbd_71f9cf883ab28f832023-11-15 · +5dCandidate
Massachusetts State AGbd_19c43c38a5eb690d2023-11-21 · +11dCandidate

Show 6 more filings ↓up to 19d gap

Massachusetts State AGbd_6295fa6d60212f632023-11-21 · +11dCandidate
Massachusetts State AGbd_034fcad9a9bc0d6b2023-11-29 · +19dCandidate
Massachusetts State AGbd_666cb738f92b27422023-11-29 · +19dCandidate
Massachusetts State AGbd_7d04f71e79bc71da2023-11-29 · +19dCandidate
Massachusetts State AGbd_eb8666c5ea5ed4822023-11-29 · +19dCandidate
Massachusetts State AGbd_fd3c24d0df6a5b3b2023-11-29 · +19dCandidate

Showing first 10 of 19 linked disclosures.

Name: Mutual One Bank
norm: mutual one bank

Name: Mutual One Bank
norm: mutual one bank

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: PCI
Data elements: Payment card number
Stated not affected: Social Security numberFinancial 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 · 11 filings

View merged incident ↗

Massachusetts State AGNov 10 · first · this page

Massachusetts State AG+5d

Massachusetts State AG+11d

Massachusetts State AG+19d

Pattern: first filing Nov 10 (MA), last Nov 29 (MA) — a 19-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 19 — the full spread may be wider.

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-2023/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 10, 2023
Raw hash: bafcc242a1a20dda8980fbc026343f29f11b56684432d45794b5b1d431624170

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityMutual One Bank

Victim entityMutual One Bank

IncidentUnknown

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov