HackingFinancial ServicesFinanceCustomer Data InvolvedSupply Chain (3P Vendor)Financial accountPCILowActive

Eastern Bank

bd_682592668a83450f · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Aug 6, 2026

To disclose

—

Affected

243state residents only

Linked

4 filings

Confidence

67%

Full breach record for Eastern Bank →204 incidents on file

Eastern Bank notified Massachusetts customers of a potential security breach involving a merchant where Eastern Bank Debit MasterCard BusinessCard transactions occurred. The bank issued new cards and lowered limits to $500. Details of the breach were not provided by the merchant. Notification date is August 6, 2026.

J jump to incidentP pin to compareR raw source

Incident timeline — partial

? — ?

Breach window unknown

Aug 6, 2026

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

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Massachusetts State AGbd_d9eac86bf9dbdfd72026-07-24 · +13dCandidate
Massachusetts State AGbd_566f14d500ef34f32026-06-30 · +37dCandidate
Massachusetts State AGbd_f59acb674bba6daf2026-05-13 · +85dCandidate

Name: Eastern Bank
norm: eastern bank
Domain: easternbank.com

Name: Eastern Bank
norm: eastern bank
Domain: easternbank.com
Industry: Financial Servicesllm

Discovered: —
Materiality determined: —
Notification sent: Aug 6, 2026
Affected individuals: 243state-resident count only
Data types: Financial accountPCI
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain Compromise
Threat actor: Partner
Initial access: supply_chain

During the incident: Lowering the limits on your current card to $500
Mailing you a new debit card
Instructing customers to activate new card and destroy old card
Instructing customers to monitor account(s) closely
Changes made: Lowering card limits to $500
Issuing new debit cards
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings

View merged incident ↗

Massachusetts State AGMay 13 · first

Massachusetts State AG+48d

Massachusetts State AG+72d

Massachusetts State AG+85d · this page

Pattern: first filing May 13 (MA), last Aug 6 (MA) — a 85-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/2026-1297-eastern-bank/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 6, 2026
Raw hash: e34c56adc436d914042b20c8e9d667ff3f15f358c0cd4681145efe6eab3f83cf

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityEastern Bank

Victim entityEastern Bank

IncidentThird-Party / Supply Chain

Stated responseLowering the limits on your current card to $500

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov