HackingHospitalityHospitalityStolen CredentialsSupply Chain (3P Vendor)Employee Data InvolvedIdentity (basic)Government IDHighContained

MARRIOTT INTERNATIONAL, INC.

bd_90d11629dfeffc0c · schema v1 · pii pii-v1

Severity

High

Discovered

Sep 4, 2019

Filed

Oct 30, 2019

To disclose

8 weeks

Affected

1,552state residents only

Linked

2 filings

Confidence

67%

Full breach record for MARRIOTT INTERNATIONAL, INC. →9 incidents on file

Marriott International notified California residents that an unknown person accessed associate information via a third-party vendor's network. The incident, discovered on September 4, 2019, involved names, addresses, and Social Security numbers of 1,552 California residents. Marriott terminated the vendor relationship and offered one year of identity monitoring.

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California clockDiscovered Sep 4, 2019 → Notified Oct 30, 201956d ✓ CA 60-day OK8 weeks discovery → filing

Incident timeline

discovery → filing · 8 weeks / 56 days

Sep 4, 2019

Discovered

Oct 30, 2019

Filed

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_dd4e6c3aa8b831d32019-10-30Verified

Name: MARRIOTT INTERNATIONAL, INC.
norm: marriott international
Domain: marriott.com

Name: MARRIOTT INTERNATIONAL, INC.
norm: marriott international
Domain: marriott.com
Industry: Hospitalityllm

Discovered: Sep 4, 2019
Materiality determined: —
Notification sent: Oct 30, 2019
Affected individuals: 1,552state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain Compromise
Threat actor: External
Third party: via Outside vendor formerly used by Marriott
Initial access: supply_chain

During the incident: Confirmed that the vendor was taking appropriate steps to investigate the incident
Vendor reported that it was working with a forensic firm
Vendor notified law enforcement
Terminated its relationship with the vendor
Vendor confirmed that it has securely removed all information regarding Marriott associates from its network
Provided access to resources to monitor for misuse of information
Arranged for complimentary one-year membership in Experian’s IdentityWorks Credit 3B
Established a dedicated call center to provide further information and answer questions
Changes made: Terminated its relationship with the vendor
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(56 days from discovery to filing)
Compliance flags: CA 60-day OK · 56d
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 4, 2019
→ Notified: Oct 30, 2019
56d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Sep 4, 2019 → Notified: Oct 30, 2019	56d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGOct 30 · first

California State AGOct 30 · first · this page

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/sb24-183963
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 30, 2019
Raw hash: 48277a286d44a58c310693a7aaef585cb24b861b30b6ef55c28cb09e8afba539

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMARRIOTT INTERNATIONAL, INC.

Victim entityMARRIOTT INTERNATIONAL, INC.

Incidentdiscovered Sep 4, 2019

Stated responseConfirmed that the vendor was taking appropriate steps to investigate the incident

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov