PhysicalProfessional ServicesProfessional ServicesTheftEmployee Data InvolvedIdentity (basic)Government IDPCIMediumContained

National Corporate Housing

bd_3eb36b6bbbedec7f · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 19, 2026

Filed

Aug 7, 2026

To disclose

11 weeks

Affected

17state residents only

Confidence

64%

Full breach record for National Corporate Housing →

National Corporate Housing experienced a physical security breach at its Denver location between January 1, 2026, and May 19, 2026. An unauthorized actor entered a locked storage room and removed paper HR records containing names, addresses, Social Security numbers, driver's license numbers, and dates of birth. The company discovered the incident on May 19, 2026, reported it to local police, engaged third-party experts, and is offering 24 months of identity monitoring services to affected individuals.

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Massachusetts clock⏱ MA AG >30d11 weeks discovery → filing

Incident timeline

undetected · 138 days

discovery → filing · 11 weeks / 80 days

Jan 1, 2026

Begins

May 19, 2026

Discovered

Aug 7, 2026

Filed

vs. sector median

7 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed17 affectedView incident

Name: National Corporate Housing
norm: national corporate housing

Name: National Corporate Housing
norm: national corporate housing
Industry: Professional Servicesllm

Discovered: May 19, 2026
Breach occurred: Jan 1, 2026 – May 19, 2026
Undetected for: 138 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 17state-resident count only
Data types: Identity (basic)Government IDPCI
Data elements: Social Security numberDate of birth
Attack vector: Unknown
MITRE ATT&CK: T1052 Exfiltration Over Physical Medium
Threat actor: External

During the incident: Launched an in-depth investigation to determine the scope of the Incident and identify those potentially affected
Working with our human resources team
Engaging third-party experts
Reported the Incident to the Greenwood Village Police Department on May 19, 2026
Offering complimentary access to identity monitoring, fraud consultation, and identity theft restoration services
Changes made: Revisiting our access control measures for stored files
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(80 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/2026-1305-national-corporate-housing/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 7, 2026
Raw hash: d929f188c8e8d9654258985c00b7f97081a6b64e0b04b714a175f03048e4e7a3

Reporting entityNational Corporate Housing

Victim entityNational Corporate Housing

Incidentdiscovered May 19, 2026

Stated responseLaunched an in-depth investigation to determine the scope of the Incident and identify those potentially affected

ComplianceMA AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov