HackingRetail & ConsumerRetailData ExfiltratedCustomer Data InvolvedIdentity (basic)LowContained

Boyd Gaming Corporation

bd_d00c1c2465555cb6 · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 6, 2025

Filed

Oct 1, 2025

To disclose

25 days

Affected

Not disclosed

Linked

10 filings

Confidence

65%

Full breach record for Boyd Gaming Corporation →

Boyd Gaming Corporation notified the California Attorney General of a cyber incident involving unauthorized removal of personal information (names and other data elements) from its systems. The unauthorized activity occurred between September 5 and September 7, 2025, and was discovered on September 6, 2025. The company engaged external cybersecurity experts and coordinated with federal law enforcement. Affected individuals were offered two years of complimentary credit monitoring.

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California clockDiscovered Sep 6, 2025 → Notified Sep 24, 202518d ✓ CA 60-day OK25 days discovery → filing

Incident timeline

undetected · 1 days

discovery → filing · 25 days

Sep 5, 2025

Begins

Sep 6, 2025

Discovered

Oct 1, 2025

Filed

vs. sector median

5 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

Maine State AGbd_5466f54815e13dc02025-10-01Verified
Illinois State AGbd_7fc93624cae46c4c2025-10-01Verified
Vermont State AGbd_4d481001b07bc0f12025-10-02 · +1dVerified
Texas State AGbd_5385549096954c1e2025-10-02 · +1dVerified

Show 5 more filings ↓up to 8d gap

Iowa State AGbd_fa49a9bb13c2a59c2025-10-02 · +1dVerified
New Hampshire State AGbd_08fb36c9e929cb422025-10-06 · +5dVerified
Indiana State AGbd_106fff4bfd61efe62025-09-24 · +7dVerified
Montana State AGbd_b508b0707b18975f2025-09-24 · +7dVerified
SEC 8-Kbd_1a7e1ea1df6ca8ff2025-09-23 · +8dVerified

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: Not disclosed
Data types: Identity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Coordinated with federal law enforcement

During the incident: Launched an investigation with the support of external cybersecurity experts
Coordinated with federal law enforcement
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 complimentary two-year credit monitoring service through IDX
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: 25 days(25 days from discovery to filing)
Compliance flags: CA 60-day OK · 18d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Sep 6, 2025
→ Notified: Sep 24, 2025
18d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Sep 6, 2025 → Notified: Sep 24, 2025	18d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

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 · this page

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://oag.ca.gov/ecrime/databreach/reports/sb24-612086
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 1, 2025
Raw hash: 98cdf58f35e8bc1b82531e3285d9be9c170020a24a0250e317587dd6e15ce29e

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

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov