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Latest / California / December 2023

MGM Resorts International

MGM Resorts International notified California AG on Dec 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
Dec 5, 2023
Date(s) of breach
Friday, September 8, 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
Oct 5, 2023, as stated in the letter
"10/5/23, 2:36 PM Notice of Data Breach - MGM Resorts https://www.mgmresorts.com/en/notice-of-data-breach.html 1/4 Notice of Data Breach October 5, 2023 We recently learned of a cybersecurity issue a ff ecting our company."
Days to notice
61 days from discovery (Oct 5, 2023) to the California record (Dec 5, 2023). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82). Over the statutory period
Offered in the letter
credit or identity monitoring
Third party
The letter attributes the incident to a vendor or service provider
First seen by BreachTally
2026-10-30 15:55 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 15:55 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 Oregon DOJ OR Oct 5, 2023 0 Not stated
MGM Resorts International California AG CA Oct 5, 2023 Not published Social Security numberPassport numberFinancial / bank accountDate of birth+5
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.