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Latest / California / October 2023

MGM Resorts International

MGM Resorts International notified California AG on Oct 5, 2023 of a data breach, which occurred on Sep 12, 2023. Data exposed: Social Security number, Passport number, Financial / bank account, Date of birth, Usernames / passwords, Email address, Phone number, Postal address, Name.

All 5 filings by MGM Resorts International, state by state · Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization
MGM Resorts International
Source
California AG · source record
Date reported
Oct 5, 2023
Date(s) of breach
Friday, September 8, 2023Saturday, September 9, 2023Sunday, September 10, 2023Monday, September 11, 2023Tuesday, September 12, 2023
Residents affected
Not published by this source
Data exposed
Social Security number Passport number Financial / bank account Date of birth Usernames / passwords Email address Phone number Postal address Name
Notice letter
Sample notice (PDF)
Discovered
Sep 29, 2023, as stated in the letter
"On or around September 29, 2023, we determined that an unauthorized third party obtained personal information of some of our customers on September 11, 2023."
Days to notice
6 days from discovery (Sep 29, 2023) to the California record (Oct 5, 2023). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
Offered in the letter
24 months of credit or identity monitoring through Experian
Third party
The letter attributes the incident to a vendor or service provider
First seen by BreachTally
2026-10-30 15:56 UTC

Dates and counts as filed by the organization with the agency. The breach window and the report date often differ by months.

First seen by BreachTally at 15:56 UTC on Oct 30, 2026. New filings reach paid subscribers within 30 minutes of the agency posting, with the count, the data exposed and the letter. Start a 14-day free trial. We email you two days before the first charge and you cancel in one click.
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Other filings by MGM Resorts International

OrganizationSourceStateReportedResidents affectedData exposed
MGM Resorts International Massachusetts OCABR MA Mar 7, 2026 1 Social Security number
MGM Resorts International California AG CA Dec 5, 2023 Not published Social Security numberPassport numberFinancial / bank accountDate of birth+5
MGM Resorts International Oregon DOJ OR Oct 5, 2023 0 Not stated
MGM Resorts International Delaware DOJ DE Oct 5, 2023 0 Social Security numberPassport numberFinancial / bank accountDate of birth+5

Data reproduced from a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.