Social EngineeringFinancial ServicesFinancePhishingData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

Mariner Wealth Advisors, LLC

bd_fe3948411c5ce93d · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 24, 2025

Filed

Jun 1, 2026

To disclose

27 weeks

Affected

35state residents only

Linked

7 filings

Confidence

66%

Full breach record for Mariner Wealth Advisors, LLC →2 incidents on file

Mariner Wealth Advisors, LLC reported a security incident to the New Hampshire Attorney General on June 1, 2026. A criminal third party impersonated MWA IT help desk agents via a spoofed domain to phish credentials from three associates starting November 21, 2025. The incident affected 35 New Hampshire residents, exposing names, account numbers, dates of birth, and SSNs/government IDs. The accounts were isolated, law enforcement was notified, and victims were offered 12 months of credit monitoring.

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Incident timeline

undetected · 3 days

discovery → filing · 27 weeks / 189 days

Nov 21, 2025

Begins

Nov 24, 2025

Discovered

Jun 1, 2026

Filed

vs. sector median

+18 wks slower

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

California State AGbd_042e1d26630afaf72026-06-01Verified
Washington State AGbd_7b9c677fce6b96d22026-06-01Verified
Maine State AGbd_dc209b391466c5de2026-06-01Verified
Massachusetts State AGbd_b1757d3f979464622026-06-02 · +1dCandidate

Show 2 more filings ↓up to 3d gap

Indiana State AGbd_01f2ddbfef6a94ce2026-05-29 · +3dVerified
Nebraska State AGbd_9cf755fca5b2e75e2026-05-29 · +3dVerified

Name: Polsinelli PC
norm: polsinelli

Name: Mariner Wealth Advisors, LLC
norm: mariner wealth advisors
Industry: Financial Servicesllm

Discovered: Nov 24, 2025
Breach occurred: Nov 21, 2025
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 29, 2026
Affected individuals: 35state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified federal law enforcement
Initial access: phishing_link

During the incident: Notified federal law enforcement
Engaged external cybersecurity experts
Isolated, secured, and analyzed affected accounts
Submitted a takedown request for the fraudulent domain
Changes made: Secured the referenced cloud applications
Emphasized cybersecurity awareness in employee training materials
Working with external advisors to fortify cybersecurity defenses
Engaged third-party researchers to monitor websites, forums and other online sources for signs of data misuse
Offered complimentary credit monitoring service for twelve (12) months
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 27 weeks(189 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 7 states

View merged incident ↗

Indiana State AGMay 29 · first

Nebraska State AGMay 29 · first

California State AG+3d

Washington State AG+3d

Maine State AG+3d

New Hampshire State AG+3d · this page

Massachusetts State AG+4d

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://mm.nh.gov/files/uploads/doj/remote-docs/mariner-wealth-advisors-20260601.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 1, 2026
Raw hash: 56da6080660acdac48821f027565ae173bbca8277ca90c6da560c30847a1989d

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityPolsinelli PC

Victim entityMariner Wealth Advisors, LLC

Incidentdiscovered Nov 24, 2025

Stated responseNotified federal law enforcement

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov