HackingFinancial ServicesFinanceSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Government IDMediumContained

Bangkok Bank Public Company Limited, New York Branch

bd_1daf6da5c59afffb · schema v1 · pii pii-v2

Severity

Medium

Discovered

—

Filed

Sep 1, 2026

To disclose

—

Affected

Not disclosed

Confidence

65%

Full breach record for Bangkok Bank Public Company Limited, New York Branch →

Bangkok Bank Public Company Limited, New York Branch disclosed a data security incident involving its audit services provider, Mercadien, P.C. An unauthorized third party accessed files containing personal information, including names, addresses, dates of birth, and Social Security numbers. The bank engaged a third-party investigation and is offering 24 months of free credit monitoring to affected individuals. No evidence of misuse has been found.

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Incident timeline — partial

? — ?

Breach window unknown

Sep 1, 2026

Filed

—

No filing yet · watching

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: Bangkok Bank Public Company Limited, New York Branch
norm: bangkok bank public company limited new york branch

Name: Bangkok Bank Public Company Limited, New York Branch
norm: bangkok bank public company limited new york branch
Industry: Financial Servicesllm

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Third party: via Mercadien, P.C.
Initial access: trusted_relationship

During the incident: Engaged third-party investigation to confirm the extent of the compromise
Completed a comprehensive data analysis to identify all impacted individuals
Providing access to free credit monitoring through IDX for 24 months
Changes made: Committed to continuing to enhance data protection procedures to help prevent a similar event from occurring in the future
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.

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/2026-1526-bangkok-bank-pcl-new-york/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 1, 2026
Raw hash: f9c31579fb6ba65a7f6ccc1bb47c8b7eecb84cbcaf07b975be2f8353a8481812

Reporting entityBangkok Bank Public Company Limited, New York Branch

Victim entityBangkok Bank Public Company Limited, New York Branch

IncidentThird-Party / Supply Chain

Stated responseEngaged third-party investigation to confirm the extent of the compromise

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov