HackingRetail & ConsumerRetailStolen CredentialsData ExfiltratedCustomer Data InvolvedPIIIdentity (basic)LowContained

Boyd Gaming Corporation

bd_b508b0707b18975f · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 6, 2025

Filed

Sep 24, 2025

To disclose

18 days

Affected

40state residents only

Linked

10 filings

Confidence

65%

Full breach record for Boyd Gaming Corporation →

Boyd Gaming Corporation notified affected individuals of a data breach where unauthorized access occurred between September 5 and 7, 2025. Personal information, including names, was removed from systems. The company engaged external cybersecurity experts and federal law enforcement, terminated access, and offered two years of complimentary credit monitoring and identity protection services.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 1 days

discovery → filing · 18 days

Sep 5, 2025

Begins

Sep 6, 2025

Discovered

Sep 24, 2025

Filed

vs. sector median

6 wks faster

This filing is one of 10 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

Indiana State AGbd_106fff4bfd61efe62025-09-24Verified
SEC 8-Kbd_1a7e1ea1df6ca8ff2025-09-23 · +1dVerified
Maine State AGbd_5466f54815e13dc02025-10-01 · +7dVerified
Illinois State AGbd_7fc93624cae46c4c2025-10-01 · +7dVerified

Show 5 more filings ↓up to 12d gap

California State AGbd_d00c1c2465555cb62025-10-01 · +7dVerified
Vermont State AGbd_4d481001b07bc0f12025-10-02 · +8dVerified
Texas State AGbd_5385549096954c1e2025-10-02 · +8dVerified
Iowa State AGbd_fa49a9bb13c2a59c2025-10-02 · +8dVerified
New Hampshire State AGbd_08fb36c9e929cb422025-10-06 · +12dVerified

Name: Boyd Gaming Corporation
norm: boyd gaming

Name: Boyd Gaming Corporation
norm: boyd gaming
Industry: Retail & Consumerllm

Discovered: Sep 6, 2025
Breach occurred: Sep 5, 2025 – Sep 7, 2025
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Sep 24, 2025
Affected individuals: 40state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: coordination with federal law enforcement
Initial access: valid_credentials

During the incident: Launched an investigation with the support of external cybersecurity experts
Took steps to prevent further unauthorized activity and secure our environment
Terminated the unauthorized third party's access to the affected portion of our environment
Engaged third-party cybersecurity specialists to assist with the investigation and response
Continue to coordinate with federal law enforcement regarding the incident
Invest in additional security enhancements designed to mitigate against future risk
Arranged for you, at your option, to enroll in a complimentary two-year credit monitoring service
Engaged IDX to provide you with its Identity Protection Services
Changes made: Invest in additional security enhancements designed to mitigate against future risk
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 days(18 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 9 states

View merged incident ↗

SEC 8-KSep 23 · first

Indiana State AG+1d

Montana State AG+1d · this page

Maine State AG+8d

Illinois State AG+8d

California State AG+8d

Vermont State AG+9d

Texas State AG+9d

Iowa State AG+9d

New Hampshire State AG+13d

Pattern: first filing Sep 23, last Oct 6 (NH) — a 13-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/2025/10/Consumer-notification-letter-12.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 24, 2025
Raw hash: 1435fe2a7bf0dd27838b1cc7f1a9fc660191582600e12ad5386115a2a74c04df

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityBoyd Gaming Corporation

Victim entityBoyd Gaming Corporation

Incidentdiscovered Sep 6, 2025

Stated responseLaunched an investigation with the support of external cybersecurity experts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov