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Confirmed breach

Fullsteam Software Holdings LLC d/b/a Event Rental Systems data breach

USUnited States

Fullsteam Software Holdings LLC d/b/a Event Rental Systems (United States) notified the California Attorney General of a data breach on 15 December 2025. The breach began on 16 September 2025, 90 days before it was reported.

Status
Confirmed breach
People affected
Not reported yet
Reported
15 December 2025
Breach began
16 September 2025
Time to tell
90 days (the median in California’s notices over the last year: 154 days)

What was exposed

The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.

Sources

Official notices are read by code from the regulator’s own register. More notices to California. · Corrections and changes

If Fullsteam Software Holdings LLC d/b/a Event Rental Systems had your data

  1. Look for Fullsteam Software Holdings LLC d/b/a Event Rental Systems’s own notice or letter: it should say what of yours was involved. Keep it.
  2. The register’s list does not say what was exposed; the notice it links to (under Sources) usually does. If Fullsteam Software Holdings LLC d/b/a Event Rental Systems has a password of yours, change it now to be safe.
  3. Expect scams that use your details: calls, texts or emails pretending to be Fullsteam Software Holdings LLC d/b/a Event Rental Systems, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

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From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.