Nationstar Mortgage LLC dba Mr. Cooper Data Breach Notice (Montana Attorney General)
If you received a notice from Nationstar Mortgage LLC dba Mr. Cooper, here’s what the filing says was exposed, and what to do about it.
Nationstar Mortgage LLC dba Mr. Cooper notified Montana residents of a data breach in a filing reported to the Montana Department of Justice on December 15, 2023. The filing puts the incident itself on October 30, 2023.
Report details & sourcing
Severity
Low
contact details only, none of them permanent
Disclosed
December 15, 2023
Last reviewed
July 22, 2026
Affected
36903
Data exposed
Personal information (per the breach notification)
Editorial & sourcing policy
GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.
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