The ACSC Essential Eight is a cybersecurity framework developed by the Australian Cyber Security Centre (ACSC) to help organisations protect their systems, data, and users from common cyber threats. It outlines eight key security strategies designed to reduce the risk of cyber attacks such as ransomware, malware infections, and unauthorised access. These strategies include important security practices such as patching applications, enabling Multi-Factor Authentication (MFA), restricting administrative privileges, and maintaining reliable data backups.
The Essential Eight provides organisations with a practical and structured approach to improving cybersecurity and strengthening their overall security posture. Rather than focusing on complex security frameworks, it prioritises the most effective controls that significantly reduce cyber risk.
Each strategy is measured across three maturity levels —
- Level 1 (basic protection),
- Level 2 (improved security management), and
- Level 3 (advanced proactive security).
These levels help organisations progressively strengthen their cyber resilience and implement measurable, practical security improvements over time.