HackingFinancial ServicesFinanceStolen CredentialsTargetedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

LPL FINANCIAL LLC

bd_7ee0fbe7bf2e436e · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 10, 2025

Filed

Dec 26, 2025

To disclose

11 weeks

Affected · nationwide

531 in this filing

Confidence

66%

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

LPL Financial LLC reported a cybersecurity incident where foreign threat actors accessed affiliated financial advisors' online accounts to execute a "hack pump-and-dump" trading scheme. The breach occurred between September 30 and October 10, 2025, affecting 53 individuals, including 1 Maine resident. Personal information was potentially viewed. LPL contacted law enforcement, secured accounts, and offered 24 months of credit monitoring via TransUnion.

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Maine clockDiscovered Oct 10, 2025 → Filed with AG Dec 26, 202577d ⏱ ME AG >30d11 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 10 days

discovery → filing · 11 weeks / 77 days

Sep 30, 2025

Begins

Oct 10, 2025

Discovered

Dec 26, 2025

Filed

vs. sector median

+3 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed53 affectedView incident

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

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

Discovered: Oct 10, 2025
Breach occurred: Sep 30, 2025 – Oct 10, 2025
Undetected for: 10 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 26, 2025
Affected individuals: 53state + nationwide
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Regulator citations: Contacted law enforcement
Initial access: valid_credentials

During the incident: Contacted law enforcement
Launched investigation with assistance from outside experts
Stopped unauthorized activity
Restored impacted accounts to original securities holding positions
Secured all affected accounts
Implemented new technical safeguards
Engaged outside information security and technology experts
Changes made: Implemented new technical safeguards to strengthen existing security controls
Engaged outside information security and technology experts to assist in review and investigation
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(77 days from discovery to filing)
Compliance flags: ME AG >30d · 77dLeak >90d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Oct 10, 2025
→ Filed with AG: Dec 26, 2025
77d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Oct 10, 2025 → Filed with AG: Dec 26, 2025	77d	30 days (soft)	ME AG >30d

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.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/72ec20c5-d3a6-4c15-9190-20140874d0a0.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 26, 2025
Raw hash: 54fe5b3e7ecfb504342c8667703b18fa17c06cba17c31b34d2e606f5ab0aa982

Reporting entityLPL FINANCIAL LLC

Victim entityLPL FINANCIAL LLC

Incidentdiscovered Oct 10, 2025

Stated responseContacted law enforcement

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov