UnknownFinancial ServicesFinanceFinancial accountPCILow

Main Street Bank

bd_8c3187be5b521ced · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Dec 23, 2025

To disclose

—

Affected

1state residents only

Linked

3 filings

Confidence

95%

Full breach record for Main Street Bank →208 incidents on file

Main Street Bank reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2025-12-23. 1 Massachusetts residents were affected.

J jump to incidentP pin to compareR raw source

Incident timeline — partial

? — ?

Breach window unknown

Dec 23, 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_81d34669d8cbdabb2025-12-19 · +4dCandidate
Massachusetts State AGbd_bd23d26ec91f900b2025-12-19 · +4dCandidate

Name: Main Street Bank
norm: main street bank

Name: Main Street Bank
norm: main street bank
Industry: Financial Servicesregulator portal

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: Financial accountPCI
Data elements: Financial account numberPayment card number
Stated not affected: Social Security numberMedical informationDriver'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 AGDec 19 · first

Massachusetts State AG+4d · 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: Dec 23, 2025
Raw hash: 72d08cf1d9c1f959f21d0670981d81a901ae26e7cec5c7e203a68a0a0237e1f0

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMain Street Bank

Victim entityMain Street Bank

IncidentUnknown

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov