HackingFinancial ServicesFinanceData ExfiltratedCustomer Data InvolvedSupply Chain (3P Vendor)Financial accountPCILowActive

Eastern Bank

bd_d9eac86bf9dbdfd7 · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Jul 24, 2026

To disclose

—

Affected

326state residents only

Linked

4 filings

Confidence

67%

Full breach record for Eastern Bank →204 incidents on file

Eastern Bank notified Massachusetts customers via state-agency filing dated 2026-12-15 regarding a breach at a third-party merchant accepting Eastern Bank Debit MasterCard BusinessCards. The bank issued notices on 2026-07-24, lowering card limits to $500 and mailing replacement cards. Specific details of the merchant breach were not provided by the third party. Financial account data (card numbers) was potentially compromised.

J jump to incidentP pin to compareR raw source

Incident timeline — partial

? — ?

Breach window unknown

Jul 24, 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_682592668a83450f2026-08-06 · +13dCandidate
Massachusetts State AGbd_566f14d500ef34f32026-06-30 · +24dCandidate
Massachusetts State AGbd_f59acb674bba6daf2026-05-13 · +72dCandidate

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: Jul 24, 2026
Affected individuals: 326state-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
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 · this page

Massachusetts State AG+85d

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/2026-1215-eastern-bank/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 24, 2026
Raw hash: 4611d5b48e6eccc58eba7946f9ce8657e2d2424ffaef01b5a851c25f189f6005

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