UnknownProfessional ServicesProfessional ServicesCustomer Data InvolvedPIIIdentity (basic)LowContained

Morrison Cohen, LLP

bd_e9600cd4ba06da68 · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 13, 2025

Filed

Feb 16, 2026

To disclose

9 weeks

Affected

Not disclosed

Confidence

66%

Morrison Cohen LLP detected unauthorized access to its network on December 13, 2025. A forensic investigation concluded on January 19, 2026, that certain files containing personally identifiable information may have been accessed. The firm engaged external cybersecurity professionals and is offering 24 months of complimentary identity monitoring to affected individuals in Massachusetts and New York.

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Massachusetts clock⏱ MA AG >30d9 weeks discovery → filing

Incident timeline

discovery → filing · 9 weeks / 65 days

Dec 13, 2025

Discovered

Feb 16, 2026

Filed

vs. sector median

8 wks faster

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

Name: Morrison Cohen, LLP
norm: morrison cohen

Name: Morrison Cohen, LLP
norm: morrison cohen
Industry: Professional Servicesllm

Discovered: Dec 13, 2025
Materiality determined: —
Notification sent: Feb 6, 2026
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)
Attack vector: Unknown

During the incident: Commenced a prompt and thorough investigation
Working very closely with external cybersecurity professionals experienced in handling these types of incidents
Providing 24 months of Iris Identity Monitoring at no charge
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(65 days from discovery to filing)
Compliance flags: MA AG >30d
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/2026-222-morrison-cohen-llp/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 16, 2026
Raw hash: de83703e57d459f3184e140050674a03799f662b409a2c9b3f20014d56f5668f

Reporting entityMorrison Cohen, LLP

Victim entityMorrison Cohen, LLP

Incidentdiscovered Dec 13, 2025

Stated responseCommenced a prompt and thorough investigation

ComplianceMA AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov