HackingHospitalityHospitalityStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDPIIMediumContained

The Historic Thayer Hotel

bd_8009cd56be9477b8 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 19, 2025

Filed

Oct 31, 2025

To disclose

6 weeks

Affected

11state residents only

Linked

11 filings

Confidence

66%

The Historic Thayer Hotel experienced unauthorized access to its computer systems on September 19, 2025. The incident exposed personal information including names combined with driver's license numbers, passport numbers, dates of birth, and state ID numbers. A small number of individuals may have had Social Security numbers impacted. The hotel engaged third-party forensic specialists, notified law enforcement, and is offering 12 months of credit monitoring to affected individuals.

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Incident timeline

discovery → filing · 6 weeks / 42 days

Sep 19, 2025

Begins

Sep 19, 2025

Discovered

Oct 31, 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

Illinois State AGbd_9f4989b24d7d4ab92025-11-01 · +1dVerified
California State AGbd_12aa427de683d4752025-11-03 · +3dVerified
Indiana State AGbd_5ff7442183fae9c42025-11-03 · +3dVerified
Maine State AGbd_7e2139f3f98129d02025-11-03 · +3dVerified

Show 6 more filings ↓up to 5d gap

Nebraska State AGbd_865aea85ac9a92842025-11-03 · +3dVerified
Massachusetts State AGbd_dedd83364d9f23632025-11-03 · +3dVerified
Nebraska State AGbd_ebafb05ebc7ff7242025-11-03 · +3dVerified
Vermont State AGbd_fed038a81b8b76ac2025-11-03 · +3dVerified
Texas State AGbd_d48218c6d02db3462025-11-04 · +4dVerified
New Hampshire State AGbd_21fe280fdcbdc5b02025-11-05 · +5dVerified

Name: The Historic Thayer Hotel
norm: historic thayer hotel
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: 11state-resident count only
Data types: Identity (basic)Government IDPII
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notifying appropriate regulators and others as required by governing law
Initial access: valid_credentials

During the incident: Secured our systems against similar events
Notify law enforcement
Restoring our own access to our systems
Launched an investigation with the assistance of third-party forensic specialists and cybersecurity professionals
Notifying affected individuals
Providing resources to help protect their information
Notifying appropriate regulators and others as required by governing law
Secured the services of Kroll Security to provide credit monitoring services
Changes made: Implementing additional safety measures to prevent a recurrence of such an incident
Continually evaluate and modify our practices and internal controls to enhance the security and privacy of personal information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(42 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 10 states

View merged incident ↗

Montana State AGOct 31 · first · this page

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

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://dojmt.gov/wp-content/uploads/2025/11/Consumer-notification-letter-7.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 31, 2025
Raw hash: 66124aef475bb10bb1251f91f2900749708781f957983ef652a1aab21b53c4ec

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityThe Historic Thayer Hotel

Victim entityThe Historic Thayer Hotel

Incidentdiscovered Sep 19, 2025

Stated responseSecured our systems against similar events

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov