UnknownProfessional ServicesProfessional ServicesCustomer Data InvolvedGovernment IDIdentity (basic)Medium

Seyfarth Shaw, LLP

bd_457dccd3f2b3ac21 · schema v1 · pii pii-v2

Severity

Medium

Discovered

—

Filed

Sep 1, 2026

To disclose

—

Affected

142state residents only

Confidence

69%

Seyfarth Shaw, LLP notified individuals that their personal information, including Social Security numbers, names, dates of birth, and addresses, was involved in a recent event. The firm obtained this information while performing legal services for AAA Mountain West Group. Seyfarth states that none of AAA Mountain West Group’s electronic platforms or systems were involved. The firm is offering 24 months of credit monitoring and fraud assistance services.

J jump to incidentP pin to compareR raw source

Incident timeline — partial

? — ?

Breach window unknown

Sep 1, 2026

Filed

No interval is drawn: no breach start or discovery date is on record for this filing.

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed142 affectedView incident

Name: SEYFARTH SHAW LLP
norm: seyfarth shaw

Name: Seyfarth Shaw, LLP
norm: seyfarth shaw
Industry: Professional Servicesllm

Discovered: —
Materiality determined: —
Notification sent: Sep 18, 2026
Affected individuals: 142state-resident count only
Data types: Government IDIdentity (basic)
Attack vector: Unknown

During the incident: Instituting additional employee training and awareness notifications
Offering access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Providing proactive fraud assistance
Changes made: Instituting additional employee training and awareness notifications
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/2026-1588-seyfarth-shaw-llp/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: 84e9de977fa1c34d539028f4f650074e32194b2503b6d799a5adb0789842d84e

Reporting entitySEYFARTH SHAW LLP

Victim entitySeyfarth Shaw, LLP

IncidentUnknown

Stated responseInstituting additional employee training and awareness notifications

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov