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

Boyd Gaming Corporation

bd_fa49a9bb13c2a59c · schema v1 · pii pii-v1

Severity

High

Discovered

Sep 6, 2025

Filed

Oct 2, 2025

To disclose

26 days

Affected

4,000state residents only

Linked

10 filings

Confidence

66%

Full breach record for Boyd Gaming Corporation →

Boyd Gaming Corporation notified the Iowa AG of a cyber incident where unauthorized actors accessed systems between Sept 5-7, 2025. The breach exposed Iowa residents' PII including names, SSNs, and driver's license info. Boyd discovered the incident on Sept 6, 2025, and notified ~4,000 Iowa residents on Sept 24, 2025. Response included engaging forensic experts, resetting passwords, and offering 2 years of credit monitoring.

J jump to incidentP pin to compareR raw source

Iowa clock✗ IA AG >5 bday26 days discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 1 days

discovery → filing · 26 days

Sep 5, 2025

Begins

Sep 6, 2025

Discovered

Oct 2, 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_4d481001b07bc0f12025-10-02Verified
Texas State AGbd_5385549096954c1e2025-10-02Verified
Maine State AGbd_5466f54815e13dc02025-10-01 · +1dVerified
Illinois State AGbd_7fc93624cae46c4c2025-10-01 · +1dVerified

Show 5 more filings ↓up to 9d gap

California State AGbd_d00c1c2465555cb62025-10-01 · +1dVerified
New Hampshire State AGbd_08fb36c9e929cb422025-10-06 · +4dVerified
Indiana State AGbd_106fff4bfd61efe62025-09-24 · +8dVerified
Montana State AGbd_b508b0707b18975f2025-09-24 · +8dVerified
SEC 8-Kbd_1a7e1ea1df6ca8ff2025-09-23 · +9dVerified

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: 4,000state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Coordinated with federal law enforcementFiled notification with Iowa Attorney General Consumer Protection Division
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 to assist with the investigation
Coordinated with federal law enforcement
Engaged third-party forensic experts to assist with the investigation and response
Continues to coordinate with federal law enforcement regarding the incident
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
Offered impacted individuals two years of complimentary identity protection services through IDX
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 26 days(26 days from discovery to filing)
Compliance flags: IA AG >5 bday
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

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 · this page

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://www.iowaattorneygeneral.gov/media/cms/1022025__Boyd_Gaming_Corporation_EB2FE46064B35.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 2, 2025
Raw hash: 7067a0071885923d6a01c206a71bb7b711ec5515484af4e0b935a6c5c88d8365

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

ComplianceIA AG >5 bday

Extraction provenanceno artifact recorded

Source provenancewww.iowaattorneygeneral.gov