Fullsteam Software Holdings LLC d/b/a Event Rental Systems Data Breach Notice (Massachusetts Attorney General)
If you received a notice from Fullsteam Software Holdings LLC, here’s what the filing says was exposed, and what to do about it.
Fullsteam Software Holdings LLC d/b/a Event Rental Systems notified Massachusetts residents of a data breach in a filing reported to the Massachusetts Office of Consumer Affairs on December 15, 2025, and the notice lists credit or debit card numbers among the information exposed.
Report details & sourcing
Severity
High
includes account details that can be misused directly
Disclosed
December 15, 2025
Last reviewed
July 22, 2026
Affected
240
Data exposed
Credit or debit card numbers
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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