Last Updated on 27/07/2026 by Damin Murdock
Businesses often use third-party cloud infrastructures to manage daily operations and store data. However, outsourcing data storage begs the question: who is responsible if a data breach occurs? In Australia, the primary organisation retains responsibility, and outsourcing data services does not transfer a company’s legal obligation to protect that data.
At Leo Lawyers, we have experience advising clients on data security regulations. We prepared this guide to outline the legal exposure regarding cloud-based data breaches and to provide you with clear tools to mitigate regulatory risk.
Who owns cloud data?
Data breaches are when data is lost, or accessed, modified or disclosed by an unauthorised party. According to the Privacy Act 1988 (Cth), organisations can’t contract out of statutory privacy obligations. Outsourcing data hosting is legally equivalent to maintaining on-site servers. If a business collects the information, it remains responsible for it.
Legal obligations following a breach
When a security incident occurs to a third-party cloud environment, your business must consider taking the following actions:
- Take responsible steps to immediately mitigate potential harm. You must coordinate directly with your cloud vendor to isolate affected systems, revoke compromised credentials and stop any further exposure.
- Notify the affected individuals and the relevant bodies (Office of the Australian Information Commissioner (OAIC), Office of the National Data Commissioner (ONDC)) if the incident constitutes an “eligible data breach”, meaning it is likely to cause serious harm to individuals. You have to give notice as soon as practicable, with a maximum of 30 days to assess a suspected breach and comply accordingly.
- Service Level Agreements (SLAs) and Data Sharing Agreements (DSAs) should explicitly dictate breach protocols. We advise our clients to always include clauses that require vendors to notify you immediately, provide forensic assistance during investigations, and guarantee secure data erasure or return upon contract termination.
Practical Risk Mitigation Strategies
Relying solely on a vendor’s reputation leaves your business vulnerable. A proactive compliance strategy requires ongoing oversight.
- Rigorous Vendor Audits
Independent verification is essential. Regularly review your cloud providers’ security credentials, requesting updated ISO 27001 certifications or SOC 2 compliance reports. Concurrently, enforce strict internal access controls, including mandatory multi-factor authentication across all corporate accounts.
- Comprehensive Incident Logging
If the OAIC or ONDC investigates an incident, thorough documentation serves as your primary defence. Your records must meticulously capture the timeline of detection and response, the actions taken to remediate the breach and all formal correspondence with the third-party
- Statutory Exceptions to Notification
Not every cloud security incident triggers a mandatory public notification. If your organisation acts quickly to contain the breach before any serious harm occurs to individuals, the incident may not qualify as an eligible data breach.
If your organisation and the cloud provider are bound by the Privacy Act, only one entity must notify the regulator. Generally, the data custodian issues the notice while the host provides technical support.
Third-party cloud platforms offer undeniably efficienciant, but they do not mean your business iis not liable. Protecting your business requires rigorous oversight and structured planning. If you need professional legal advice, feel free to contact Damin Murdock at Leo Lawyers via our website, on (02) 8201 0051 or at office@leolawyers.com.au. Further, if you liked this article, please subscribe to our newsletter via our Website, and subscribe to our YouTube, LinkedIn, Facebook and Instagram. If you liked this article or video, please also give us a favourable Google Review.
DISCLAIMER: This is not legal advice and is general information only. You should not rely upon the information contained in this article, and if you require specific legal advice, please contact us.
Damin Murdock (J.D | LL.M | BACS - Finance) has over 17 years of experience as a commercial lawyer. He helps businesses navigate construction and technology law. Damin has held several big leadership roles, including serving as a director of a national law firm and the Chief Legal Officer for Lawpath.
He has personally helped more than 2,000 startups and small businesses. With over 300 five-star reviews, his clients clearly value his practical advice and simple way of explaining things. Damin has also hosted over 100 webinars that thousands of people have watched to get reliable legal help.
