HackingTechnologyRetail & ConsumerInformationCustomer Data InvolvedFinancial accountHealth (basic)Identity (basic)Government IDMediumContained

HILLWOOD DEVELOPMENT COMPANY, LLC

bd_2593dd605510c67f · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 15, 2026

Filed

Jul 24, 2026

To disclose

19 weeks

Affected

1state residents only

Confidence

66%

Full breach record for HILLWOOD DEVELOPMENT COMPANY, LLC →

Hillwood Development Company LLC, an industrial real estate developer, experienced a cyber incident on March 13, 2026, resulting in unauthorized access to network data. The company discovered the breach on March 15, 2026, and contained it the same day. Compromised data may include names, SSNs, DOBs, driver's licenses, financial account numbers, and health information. The company retained legal and cybersecurity experts, notified law enforcement, and is offering 24 months of Experian IdentityWorks to affected individuals.

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Massachusetts clock✗ MA AG >90d19 weeks discovery → filing

Incident timeline

undetected · 2 days

discovery → filing · 19 weeks / 131 days

Mar 13, 2026

Begins

Mar 15, 2026

Discovered

Jul 24, 2026

Filed

vs. sector median

on median

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: HILLWOOD DEVELOPMENT COMPANY, LLC
norm: hillwood development

Name: HILLWOOD DEVELOPMENT COMPANY, LLC
norm: hillwood development
Industry: TechnologyllmRetail & Consumerllm

Discovered: Mar 15, 2026
Breach occurred: Mar 13, 2026
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: Financial accountHealth (basic)Identity (basic)Government ID
Data elements: Date of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: Notified law enforcement
Initial access: exploit_public_facing

During the incident: Retained outside legal counsel and cybersecurity experts
Notified law enforcement and cooperated with their investigation
Implemented changes to policies and procedures to enhance security
Offered complimentary access to Experian IdentityWorks for 24 months
Changes made: Implemented changes to policies and procedures to enhance security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 19 weeks(131 days from discovery to filing)
Compliance flags: MA AG >90d
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/2026-1220-hillwood-development-company-llc/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 24, 2026
Raw hash: 799cb4f681a7acb1e73ec6850df4ad2dbb1323ffa1a3979cb63c3fb02b255a66

Reporting entityHILLWOOD DEVELOPMENT COMPANY, LLC

Victim entityHILLWOOD DEVELOPMENT COMPANY, LLC

Incidentdiscovered Mar 15, 2026

Stated responseRetained outside legal counsel and cybersecurity experts

ComplianceMA AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov