HackingProfessional ServicesProfessional ServicesData ExfiltratedCustomer Data InvolvedPIIIdentity (basic)Government IDMediumContained

Harrison Design Associates Inc

bd_8cfb6ecd0b1286f3 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 16, 2025

Filed

Feb 24, 2026

To disclose

10 weeks

Affected

1state residents only

Linked

4 filings

Confidence

64%

Full breach record for Harrison Design Associates Inc →

Harrison Design Associates, Inc. discovered unauthorized access to its network between December 14 and December 16, 2025. An unauthorized individual copied certain personal information. The company retained forensic specialists and legal counsel. Affected individuals are offered 12 months of credit monitoring and fraud assistance. No specific data types were listed in the provided text, but PII is implied.

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Massachusetts clock⏱ MA AG >30d10 weeks discovery → filing

Incident timeline

undetected · 2 days

discovery → filing · 10 weeks / 70 days

Dec 14, 2025

Begins

Dec 16, 2025

Discovered

Feb 24, 2026

Filed

vs. sector median

9 wks faster

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Nebraska State AGbd_77aef9d0571b34582026-02-23 · +1dVerified
Indiana State AGbd_7318ef04209cf37c2026-01-16 · +39dCandidate
New Hampshire State AGbd_ef6c8b3ccac1d32d2026-01-16 · +39dVerified

Name: Harrison Design Associates Inc
norm: harrison design associates

Name: Harrison Design Associates Inc
norm: harrison design associates
Industry: Professional Servicesllm

Discovered: Dec 16, 2025
Breach occurred: Dec 14, 2025 – Dec 16, 2025
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Feb 23, 2026
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)Government ID
Attack vector: Unknown
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External

During the incident: Retained legal counsel and third-party forensic specialists to investigate the unusual activity
Began a comprehensive review of the data set to determine what sensitive and/or personal information was potentially impacted
Notified potentially impacted individuals
Providing access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge for twelve months
Providing proactive fraud assistance
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(70 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.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Indiana State AGJan 16 · first

New Hampshire State AGJan 16 · first

Nebraska State AG+38d

Massachusetts State AG+39d · this page

Pattern: first filing Jan 16 (IN), last Feb 24 (MA) — a 39-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://www.mass.gov/doc/2026-269-harrison-design-associates/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 24, 2026
Raw hash: 27ab3bd267e5de054dda534d8ab4eab0b66d591174bfc3d7cdf4f491ad8bc6e2

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityHarrison Design Associates Inc

Victim entityHarrison Design Associates Inc

Incidentdiscovered Dec 16, 2025

Stated responseRetained legal counsel and third-party forensic specialists to investigate the unusual activity

ComplianceMA AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov