Zellis Data Breach History
WebsiteZellis is the largest provider of HR and payroll software, and managed services, to UK and Ireland-based companies with more than 1,000 employees. With more than 60 years’ experience and 1200+ employees, our AI-enabled solutions help employers power exceptional employee experiences. Zellis was named Payroll Software Supplier of the Year at the Global Payroll Association Awards 2024, and the company’s flagship solution, Zellis HCM Cloud, has won the CIPP’s Payroll Software of the Year Award (CIP
This page shows all data breaches of Zellis. View the complete breach timeline, records exposed, root causes, and AI breach risk score. BreachHistory tracks disclosed data breaches worldwide.
Data Breach Timeline — All Zellis Breaches
Zellis Data Breach Summary
This page tracks the Zellis data breach history and cybersecurity incidents affecting Zellis (Ireland). BreachHistory currently indexes 1 publicly disclosed or catalogued incident spanning 2023, with approximately an unknown number of records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.
The Zellis breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed.
Largest Zellis Data Breaches
Indexed Zellis incidents are listed below. Where a public count is unavailable, the catalog shows unknown records exposed. Open each page for attack method, data types, and sources.
- 2023 2023 Zellis — MOVEit Transfer (CVE-2023-34362); payroll supply-chain to BA, BBC, Boots, Aer Lingus, DHL cohorts — about Unknown records exposed · Catalogued incident
What Information Was Exposed?
Depending on the incident, exposed data may include email addresses, passwords, phone numbers, names, profile information, account identifiers, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.
Zellis Data Breach 2026
At the time of this update, no Zellis data breach has been catalogued for 2026. New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.
What To Do If You Were Affected
If you believe your account may have been involved in a Zellis data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.
This Zellis breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.