Cyberattacks continue to grow in both frequency and sophistication in 2026, threatening Australian businesses of all sizes. According to the Annual Cyber Threat Report 2024-25, the average self-reported cost of cybercrime for businesses increased by 50% from the previous year, with medium-sized businesses losing up to $97,200 on average per report. In this landscape, organisations are now expected to meet stronger security standards to protect their systems, data, and customers.
To protect businesses from this ongoing risk, the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) published the Essential Eight Maturity Model. It provides organisations with mitigation strategies that can protect their systems, users, and data. In particular, Essential Eight Maturity Level 3 is increasingly required for organisations that work with government or defence, have business insurance that requires cybersecurity measures, need to pass security audits, or manage sensitive or regulated data.
This guide explains what the Essential Eight framework is, what it takes to achieve Essential Eight Level 3 compliance, and how professional cybersecurity services can help you mitigate threats and meet Australian compliance.
What Is the Essential Eight Framework
Essential Eight refers to a collection of strategies that protect organisations from cyber attacks. This cybersecurity framework focuses on practical controls that stop real-world attacks such as ransomware and data theft. It was developed by the Australian Cyber Security Centre (ACSC). The Essential Eight model is commonly used by organisations in regulated industries, small- and medium-sized businesses, government agencies, and more. This model can also be used as a starting point for enterprise-level businesses’ cybersecurity strategies.
Essential Eight Maturity Levels Explained
The Essential Eight framework uses maturity levels to measure the effectiveness of cybersecurity strategies. Each level represents a stronger level of security.
Level 0
Level 0 means the organisation has some security measures, but they are inconsistent, incomplete, or not enforced across systems. This level provides minimal protection against modern cyber threats.
Level 1
Level 1 represents a basic implementation of the Essential Eight strategies. Controls are introduced but may not be consistently applied or monitored. Many organisations start here as they begin improving their cybersecurity posture.
Level 2
Level 2 provides stronger and more consistent security strategies. Controls are applied and monitored across most systems, which reduces risk from common attacks. Many regulated industries aim for Level 2 as a baseline.
Level 3
Level 3 represents a mature and hardened security posture where controls are consistently enforced, resistant to advanced threats, and actively monitored and tested. Level 3 provides the strongest protection against sophisticated cyber threats.
What Is Essential Eight Maturity Level 3?
Essential Eight Maturity Level 3 represents the most advanced cybersecurity framework. At this level, organisations enforce strict controls and regularly test and monitor controls. For many organisations, Level 3 is becoming the expected standard rather than an optional goal because it is required by insurers, contracts, and audits. Some organisations that use the Level 3 model:
- Work in the government or defence sector;
- Handle sensitive information, such as finance or banking; or
- Provide critical services, such as electricity, water, or healthcare.
What sets Level 3 apart are stronger administrative controls, ongoing monitoring, and documentation. This means that security must be actively managed on a regular basis, not just configured.
Essential Eight Level 3 Requirements
The Essential Eight framework includes eight key cybersecurity strategies.
Application Control
This strategy ensures that only approved and trusted applications are run on company systems and unauthorised software is blocked by default.
Under Level 3, application control is implemented across all:
- Workstations
- Internet-facing and non-Internet-facing servers
- User profiles
- Software libraries
- Scripts
- Installers
- Microsoft applications and drivers
It also mandates maintaining logs of application control events, which cannot be modified or deleted.
Patch Applications
Application patching means proactively updating user-facing applications to protect them against cyberattacks. This includes office productivity suites, web browsers and their extensions, PDF software, and security products.
Level 3 requires using a vulnerability scanner at least fortnightly to identify missing updates. Any updates assessed as critical by vendors must be applied within 48 hours or within 2 weeks if assessed as non-critical.
Patch Operating Systems
Apart from applications, patching also extends to the operating systems (such as Windows, MacOS, or Linux) to improve security by identifying and fixing vulnerabilities.
Level 3 instructs using the latest release of operating systems, using a vulnerability scanner to identify which patches are appropriate, and ensuring they are installed properly. Firmware patches must be applied within 48 hours of release for critical vulnerabilities and within 1 month for non-critical vulnerabilities.
Restrict Administrative Privileges
Administrative accounts have high-level privileges, allowing them to change the configuration of apps, access sensitive data and modify security settings. This makes them a major target. By minimising the number of privileged accounts, you can reduce the attack surface.
Level 3 offers different methods to restrict administrative privileges, such as
- Revoking access after 45 days of inactivity;
- Limiting access to only the required duties;
- Logging privileged access events;
- Protecting event logs from modification or deletion, and more.
Multi-Factor Authentication
Multi-factor authentication (MFA) adds an additional security layer beyond passwords. This offers extra protection in case passwords are stolen or leaked.
Under Level 3, the ASD recommends using MFA for an organisation’s data storage services, customer service platforms, and privileged system access. It also lists precautions around implementing MFA correctly, such as creating and protecting event logs, using phishing-resistant MFA methods, and responding to cybersecurity incidents as soon as they’re discovered.
Restrict Microsoft Office Macros
A macro is an embedded code that allows you to automate repetitive tasks in Microsoft Office applications. Because macros are automated, malicious macros can run malicious code immediately upon opening a document, which allows attackers to bypass security controls.
To use macros safely, Level 3 security measures require strict controls on macros so that they are:
- Checked by an assessor;
- Security settings cannot be changed by users;
- Antivirus scanning is enabled;
- Macros from any files on the internet are blocked; and more.
User Application Hardening
This refers to securing daily-use productivity applications, such as web browsers, office suites, PDF readers, etc.
Level 3 requirements offer mitigation strategies to strengthen web browsers, Microsoft Office and Windows PowerShell, office productivity suites, PDF software, and event logs.
Regular Backups
Regular backup ensures that your data, applications and settings are stored in a secure location (either physically or in the cloud). This is a fallback option in case of a data breach, ransomware attack, theft, or loss.
Level 3 requires organisations to maintain regular, tested backups that can only be accessed by privileged users so that systems and data can be restored quickly.
Why Essential Eight Level 3 Matters in 2026
Achieving Essential Eight Level 3 is becoming increasingly important for Australian businesses due to a range of factors:
- First, cyber attacks are becoming more frequent and more damaging. Ransomware, data theft, and business disruption now affect organisations of all sizes. In 2025, cyber attacks were carried out across a range of industries, with finance, health services, and government sectors seeing the most cyberattacks.
- Second, security audits are becoming a part of contract requirements, particularly for businesses that work with government or large enterprise clients.
- Business insurance providers are also raising their expectations, requiring stronger cybersecurity controls.
For many companies, reaching Level 3 is no longer just about security. It’s about remaining competitive and meeting compliance requirements.
Common Mistakes with Essential Eight Compliance
Change Management:
Security controls need to be implemented in a way that minimises disruption to the existing workflow. This means that users across the organisation will need to be aware of the Essential Eight implementation and any potential issues that may arise.
Weak multi-factor authentication:
MFA must be strengthened with stronger authentication options. Read more about strengthening your MFAs in our blog about MFA fatigue attacks and how to protect your business.
Lack of monitoring:
Controls must be actively logged, tested, and monitored to detect suspicious behaviour. Active monitoring is what sets Level 3 protection apart.
Untested backups:
Backups are useless if they cannot be successfully restored during an incident.
Outdated systems:
Legacy systems often cannot meet Essential Eight security requirements. Using the latest release of operating systems or applications is essential to meet Level 3 requirements.
No formal assessment:
In-house checks aren’t enough. A professional security assessment or audit can identify vulnerabilities much faster than in-house checks.
How to Reach the Essential Eight Level 3
Step 1: Assess Your Current Security Level
Start with an internal audit and an external, formal assessment to understand your current maturity level and identify vulnerabilities. Compare your existing security controls against Essential Eight Level 3 requirements.
Step 2: Implement Required Controls
After you have identified gaps, execute the necessary security strategies and policies across systems, applications, hardware, and user access.
Step 3: Test and Document Security Controls
Security controls should be validated through regular testing and properly documented for compliance purposes.
Step 4: Maintain Ongoing Compliance
Cybersecurity is not a set-and-forget project. Organisations must continually monitor systems, patch operating systems and applications, and maintain their security levels.
Need Help with Essential Eight Level 3?
Achieving Essential Eight Level 3 can be complex, particularly for organisations without a dedicated cybersecurity team. MSP Blueshift helps businesses across Australia implement the Essential Eight framework with practical, hands-on managed IT services. We focus on making compliance practical, achievable, and aligned with business goals. Our award-winning approach to cybersecurity keeps you safe. Work with an ISO 27001-certified business that is aligned with both the ACSC Essential Eight and the NIST Cybersecurity Framework.
Our services include:
- Security risk assessment and audit
- Essential Eight implementation
- Cyber compliance and governance services
- Ongoing cybersecurity management
MSP Blueshift is also proud to be CyberCert SMB1001 – Gold Level 3 certified. This certification demonstrates our commitment to delivering mature, standards-aligned cybersecurity protections for small to mid-sized businesses.
Take the First Step Towards Essential Eight
As cyber threats continue to evolve and compliance expectations increase, Essential Eight Maturity Level 3 is becoming the standard many organisations must meet. By implementing strong security controls and monitoring systems, businesses can significantly reduce cyber risk and meet the growing expectations of clients, regulators, and insurers.
To discuss tailored cybersecurity strategies for your business or organisation, contact MSP Blueshift. Our cybersecurity ensures your systems are protected from cyber threats and that you meet Australian compliance and Essential Eight standards.
