HackingHospitalityHospitalityCustomer Data InvolvedIdentity (basic)Government IDMediumContained

The Historic Thayer Hotel

bd_fed038a81b8b76ac · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 19, 2025

Filed

Nov 3, 2025

To disclose

6 weeks

Affected

Not disclosed

Linked

11 filings

Confidence

64%

The Historic Thayer Hotel (dba of Hudson River Partners I) experienced unauthorized access to its computer systems on September 19, 2025. The incident exposed names combined with driver's license numbers, passport numbers, dates of birth, state ID numbers, and potentially Social Security numbers for individuals in the United States. The hotel engaged third-party forensic specialists, notified law enforcement, and is offering 12 months of credit monitoring via Kroll Security. No identity theft or fraud has been observed as of the notice date.

J jump to incidentP pin to compareR raw source

Vermont clock⏱ VT AG >14 bday6 weeks discovery → filing

Incident timeline

discovery → filing · 6 weeks / 45 days

Sep 19, 2025

Begins

Sep 19, 2025

Discovered

Nov 3, 2025

Filed

This filing is one of 11 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

California State AGbd_12aa427de683d4752025-11-03Verified
Indiana State AGbd_5ff7442183fae9c42025-11-03Verified
Maine State AGbd_7e2139f3f98129d02025-11-03Verified
Nebraska State AGbd_865aea85ac9a92842025-11-03Verified

Show 6 more filings ↓up to 3d gap

Massachusetts State AGbd_dedd83364d9f23632025-11-03Verified
Nebraska State AGbd_ebafb05ebc7ff7242025-11-03Verified
Texas State AGbd_d48218c6d02db3462025-11-04 · +1dVerified
New Hampshire State AGbd_21fe280fdcbdc5b02025-11-05 · +2dVerified
Illinois State AGbd_9f4989b24d7d4ab92025-11-01 · +2dVerified
Montana State AGbd_8009cd56be9477b82025-10-31 · +3dCandidate

Name: Hudson River Partners I L.P.
norm: hudson river partners i
Domain: thethayerhotel.com

Name: The Historic Thayer Hotel
norm: historic thayer hotel
Domain: thethayerhotel.com
Industry: Hospitalityllm

Discovered: Sep 19, 2025
Breach occurred: Sep 19, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 31, 2025
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Unknown
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified law enforcementNotifying appropriate regulators

During the incident: Recovered from the event, including restoring access to systems
Secured systems against similar events
Notified law enforcement
Launched an investigation with the assistance of third-party forensic specialists and cybersecurity professionals
Notifying affected individuals
Notifying appropriate regulators
Secured the services of Kroll Security to provide credit monitoring services
Changes made: Implementing additional safety measures to prevent a recurrence
Continually evaluate and modify practices and internal controls to enhance security and privacy
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(45 days from discovery to filing)
Compliance flags: VT AG >14 bday
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 · 11 filings · 10 states

View merged incident ↗

Montana State AGOct 31 · first

Illinois State AG+1d

California State AG+3d

Indiana State AG+3d

Maine State AG+3d

Nebraska State AG+3d

Massachusetts State AG+3d

Nebraska State AG+3d

Vermont State AG+3d · this page

Texas State AG+4d

New Hampshire State AG+5d

Pattern: first filing Oct 31 (MT), last Nov 5 (NH) — a 5-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://ago.vermont.gov/document/2025-11-03-hudson-river-partners-i-dba-thayer-hotel-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 3, 2025
Raw hash: 3882f60fd043b651f6e75c59e79cd02d4da67636ca8d94153987c0a36fae7484

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityHudson River Partners I L.P.

Victim entityThe Historic Thayer Hotel

Incidentdiscovered Sep 19, 2025

Stated responseRecovered from the event, including restoring access to systems

ComplianceVT AG >14 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov