# SZB-56ead58d33: AllUnited cyberattack prompts 350+ Dutch sports clubs to report data breaches

More than 350 Dutch sports clubs reported a data breach to the Dutch Data Protection Authority after a cyberattack on AllUnited's membership administration system on a Monday evening, according to NL Times.

- Type: Breach
- Status: Confirmed
- Vendor: AllUnited
- Product: AllUnited membership administration system
- Disclosed: 2026-11-11 14:11 UTC
- Sources: 1 distinct
- First seen by cve.now: 2026-11-11 14:28 UTC · Updated: 2026-11-11 14:30 UTC

Written by a model from the sources below. Verify against them.

## Summary

The item says the breach may have exposed members' personal information and that the number of reports is expected to rise.

## What to do

- Ask your sports club whether its AllUnited data was affected and what members were told.
- Watch for phishing emails that use your club membership or personal details.
- Change your password if you reuse it on any club or AllUnited account.

## Timeline

- 2026-11-11 14:11 UTC: Made public by DataBreaches.net
- 2026-11-11 14:11 UTC: Confirmed by More than 350 Dutch sports clubs. DataBreaches.net: “More than 350 Dutch sports clubs have reported a data breach to the Dutch Data Protection Authority (AP) following a cyberattack on membership administration s…” ([source](https://databreaches.net/2026/11/11/hundreds-of-dutch-sports-clubs-report-cyberattack-exposing-members-personal-data/))
- 2026-11-11 14:28 UTC: First seen by cve.now

## Evidence (1 source)

- 2026-11-11 · Press · [DataBreaches.net](https://databreaches.net/2026/11/11/hundreds-of-dutch-sports-clubs-report-cyberattack-exposing-members-personal-data/): “More than 350 Dutch sports clubs have reported a data breach to the Dutch Data Protection Authority (AP) following a cyberattack on membership administration system AllUnited on Monday evening.”

## Corrections

None so far.

Something wrong on this page? Report an error: https://github.com/sazabi/cve.now/issues/new?title=Wrong%20fact%20on%20SZB-56ead58d33&body=https%3A%2F%2Fcve.now%2FSZB-56ead58d33%0A%0AWhat%20is%20wrong%2C%20and%20the%20source%20that%20shows%20it%3A%0A

## Questions about the AllUnited breach

### Was AllUnited breached?

Yes. More than 350 Dutch sports clubs says so: “More than 350 Dutch sports clubs have reported a data breach to the Dutch Data Protection Authority (AP) following a cyberattack on membership administration system AllUnited on Monday evening.” (DataBreaches.net).

Source: https://databreaches.net/2026/11/11/hundreds-of-dutch-sports-clubs-report-cyberattack-exposing-members-personal-data/

### What should AllUnited customers do?

Ask your sports club whether its AllUnited data was affected and what members were told. Watch for phishing emails that use your club membership or personal details. Change your password if you reuse it on any club or AllUnited account.

## Related

- Started as early warning SZB-56ead58d33, first seen 2026-11-11 14:28 UTC
- Browse: [Breaches](https://cve.now/breaches.md) · [Early warnings](https://cve.now/early-warnings.md)

---

Source: cve.now
Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards.
Page: https://cve.now/SZB-56ead58d33
Site guide for agents: https://cve.now/llms.txt