HackingProfessional ServicesProfessional ServicesStolen CredentialsCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Wisner Baum LLP

bd_ccdcb9570f81d5f9 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Dec 15, 2025

Filed

Jan 23, 2026

To disclose

—

Affected

74state residents only

Linked

11 filings

Confidence

66%

Full breach record for Wisner Baum LLP →

Wisner Baum LLP experienced unauthorized access to its IT network between October 8-9, 2025. The firm discovered on December 15, 2025, that client files containing names, Social Security numbers, and/or driver's license numbers were potentially acquired. Notifications were mailed to 74 Nebraska residents starting January 23, 2026, offering one year of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 68 days

Oct 8, 2025

Begins

Dec 15, 2025

Discovered

Jan 23, 2026

Filed

This filing is one of 11 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Oregon State AGbd_10178ff4c457f8c32026-01-23Candidate
Washington State AGbd_37073d78a5d8020d2026-01-23Verified
Massachusetts State AGbd_414e8f031fe308ff2026-01-23Verified
California State AGbd_4f695f7cf771e9832026-01-23Verified

Show 6 more filings ↓up to 22d gap

Indiana State AGbd_60ec407520bd24882026-01-23Verified
Vermont State AGbd_65e3679b02b128fe2026-01-23Verified
Indiana State AGbd_cbc68f1752ed6e5d2026-01-23Verified
Maine State AGbd_d08c7349ab190a952026-01-23Verified
Texas State AGbd_7e40321d8677cf662026-01-27 · +4dVerified
Illinois State AGbd_3f3b760f00242c122026-01-01 · +22dVerified

Name: Wisner Baum LLP
norm: wisner baum

Name: Wisner Baum LLP
norm: wisner baum
Industry: Professional Servicesllm

Discovered: Dec 15, 2025
Breach occurred: Oct 8, 2025 – Oct 9, 2025
Undetected for: 68 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 23, 2026
Affected individuals: 74state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Isolated the computers from its IT network
Launched an investigation
Undertook a comprehensive search and review of the files
Mail notification letters via United States Postal Service First-Class mail
Offering individuals whose Social Security and/or driver’s license numbers may have been involved in the incident complimentary one-year memberships to credit monitoring services through CyberScout
Established a dedicated, toll-free call center
Changes made: Implemented, and will continue to adopt, additional safeguards and technical security measures to further protect and monitor its systems
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 · 11 filings · 10 states

View merged incident ↗

Illinois State AGJan 1 · first

Oregon State AG+22d

Washington State AG+22d

Massachusetts State AG+22d

California State AG+22d

Indiana State AG+22d

Vermont State AG+22d

Indiana State AG+22d

Maine State AG+22d

Nebraska State AG+22d · this page

Texas State AG+26d

Pattern: first filing Jan 1 (IL), last Jan 27 (TX) — a 26-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://nebraska.gov/ago/data-breach/documents/7fac727f-7efa-4c59-9626-f09b5e2e2693.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 23, 2026
Raw hash: e2fe4ff0100343afd1df43ea7a70172fce1b23442fb22dfefc1f226db633c19d

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityWisner Baum LLP

Victim entityWisner Baum LLP

Incidentdiscovered Dec 15, 2025

Stated responseIsolated the computers from its IT network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov