HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedDelayed DiscoveryGovernment IDIdentity (basic)Financial accountFinancialMediumContained

LPL FINANCIAL LLC

bd_16417f1c33808cea · schema v1 · pii pii-v2

Severity

Medium

Discovered

Jun 1, 2026

Filed

Sep 1, 2026

To disclose

—

Affected

Not disclosed

Confidence

68%

Full breach record for LPL FINANCIAL LLC →37 incidents on file

LPL Financial LLC notified Massachusetts and Maryland residents of a security incident involving an associated financial advisor's device. Unauthorized third-party access via remote access software occurred between September 29, 2025, and June 1, 2026. Affected data includes names, SSNs, account numbers, contact info, and transaction history. LPL contained the incident, rotated credentials, and is offering 24 months of credit monitoring.

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Leak gap clock✗ Leak >180d

Incident timeline

undetected · 245 days

Sep 29, 2025

Begins

Jun 1, 2026

Discovered

Sep 1, 2026

Filed

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

A leak claim by cephalus about this victim predates this filing by 370 days.View originating leak claim

Name: LPL FINANCIAL LLC
norm: lpl financial
Domain: lplfinancial.com

Name: LPL FINANCIAL LLC
norm: lpl financial
Domain: lplfinancial.com
Industry: Financial Servicesllm

Discovered: Jun 1, 2026
Breach occurred: Sep 29, 2025 – Jun 1, 2026
Undetected for: 245 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 14, 2026
Affected individuals: Not disclosed
Data types: Government IDIdentity (basic)Financial accountFinancial
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1059 Command and Scripting Interpreter
Threat actor: External
Third party: via Financial Advisor
Initial access: external_remote_services

During the incident: Commenced an internal investigation
Reviewed relevant account activity
Rotated credentials
Implemented additional technical measures to help prevent further unauthorized access
Disabled the advisor's LPL portal access
Disabled the advisor's LPL email account
Restricted client accounts associated with the advisor
Working with law enforcement regarding the investigation
Changes made: Offering a complimentary 24-month membership for credit monitoring and identity theft protection services through Experian
Source: Quoted from the filing itself, not independently verified.

Compliance flags: Leak >180d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

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/2026-1540-lpl-financial-llc/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: 266d5e7a98efa784747c6ce3a012d2bbda6ea41f50e2bce41b46df2c81952c39

Reporting entityLPL FINANCIAL LLC

Victim entityLPL FINANCIAL LLC

Incidentdiscovered Jun 1, 2026

Stated responseCommenced an internal investigation

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov