HackingRetail & ConsumerRetailStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Boyd Gaming Corporation

bd_08fb36c9e929cb42 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 6, 2025

Filed

Oct 6, 2025

To disclose

4 weeks

Affected

40state residents only

Linked

10 filings

Confidence

66%

Full breach record for Boyd Gaming Corporation →

Boyd Gaming Corporation reported a cyber incident to the New Hampshire Attorney General. Unauthorized access occurred Sept 5-7, 2025, resulting in the exfiltration of personal information (names, addresses, DOB, driver's license, SSN) of 40 NH residents. Boyd discovered the incident on Sept 6, 2025, and notified affected individuals on Sept 24, 2025. Remediation included password resets and enhanced security controls.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 1 days

discovery → filing · 4 weeks / 30 days

Sep 5, 2025

Begins

Sep 6, 2025

Discovered

Oct 6, 2025

Filed

vs. sector median

4 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

Vermont State AGbd_4d481001b07bc0f12025-10-02 · +4dVerified
Texas State AGbd_5385549096954c1e2025-10-02 · +4dVerified
Iowa State AGbd_fa49a9bb13c2a59c2025-10-02 · +4dVerified
Maine State AGbd_5466f54815e13dc02025-10-01 · +5dVerified

Show 5 more filings ↓up to 13d gap

Illinois State AGbd_7fc93624cae46c4c2025-10-01 · +5dVerified
California State AGbd_d00c1c2465555cb62025-10-01 · +5dVerified
Indiana State AGbd_106fff4bfd61efe62025-09-24 · +12dVerified
Montana State AGbd_b508b0707b18975f2025-09-24 · +12dVerified
SEC 8-Kbd_1a7e1ea1df6ca8ff2025-09-23 · +13dVerified

Name: Morrison & Foerster LLP
norm: morrison foerster

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: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Coordinated with federal law enforcement
Initial access: valid_credentials

During the incident: Terminated the unauthorized third party's access to the affected portion of its environment
Engaged external cybersecurity experts
Coordinated with federal law enforcement
Engaged third-party forensic experts to assist with the investigation and response
Changes made: Blocking known indicators of compromise
Conducting an enterprise-wide password reset
Fortifying its password reset protocols
Expanding its use of encryption
Enhancing its security monitoring and logging capabilities
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 4 weeks(30 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

California State AG+8d

Vermont State AG+9d

Texas State AG+9d

Iowa State AG+9d

New Hampshire State AG+13d · this page

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://mm.nh.gov/files/uploads/doj/remote-docs/boyd-gaming-20251006.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 6, 2025
Raw hash: 45a965e44e4ac42051b1067da54332b12ae22c4d3451db3c32556ba4baa5ff3f

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityMorrison & Foerster LLP

Victim entityBoyd Gaming Corporation

Incidentdiscovered Sep 6, 2025

Stated responseTerminated the unauthorized third party's access to the affected portion of its environment

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov