NSW cyber breach – November 2026
NSW cyber breach – November 2026
The latest major NSW cyber breach involves NSW Health, with cybercriminals allegedly accessing sensitive information through the NSW Health Oral Health Fee For Service Scheme website.
The incident was publicly confirmed on 4 November 2026.
What happened?
29 October 2026: NSW Health identified unauthorised access to one of its websites.
30 October: NSW Police Cybercrime Squad was notified.
4 November: The incident was declared a major cyber incident.
Police established Strike Force Civic to investigate.
Police believe approximately 4GB of data was stolen.
ABC News+1
What information was compromised?
The affected website supports the Oral Health Fee For Service Scheme, which works with private dental providers.
Authorities say information relating to third-party health providers, particularly dentists, was accessed.
Information | Current position |
Patient medical records | No compromise reported |
Clinical information | No compromise reported |
Dentist/provider identification details | Potentially compromised |
Third-party provider information | Confirmed affected |
Other NSW government systems | No impact reported |
ABC News+1
Claims made by the hackers
A threat actor using the name bytetobreach allegedly claimed to have accessed:
Approximately 70GB of information.
Around 100,000 documents.
Information dating back to 2020.
Unverified claims
These figures have not been confirmed by NSW authorities. Police have separately indicated that approximately 4GB of data was stolen.
Cyber Daily+1
Who is responsible?
NSW Police believe there is an international element to the attack, with the suspected perpetrators potentially operating outside Australia.
The investigation involves:
NSW Police Cybercrime Squad.
Cyber Security NSW.
NSW Health.
Commonwealth cybersecurity agencies.
ABC News
Official updates
Why this breach matters
The incident highlights a major cybersecurity weakness: third-party websites and external-facing infrastructure can become entry points into government systems.
For businesses, it reinforces the importance of:
Regular vulnerability assessments.
Securing subdomains and external-facing servers.
Multi-factor authentication.
Monitoring unusual data transfers.
Isolating third-party systems from critical networks.
Maintaining tested offline backups.
Are you interested in the NSW Health breach specifically, or are you looking for a list of all major NSW government cyberattacks and data breaches, including those involving stolen customer information?
