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Guidelines for email   Advice

Dec 4, 2025 - This chapter of the Information security manual (ISM) provides guidance on email.

Detecting and mitigating Active Directory compromises   Publication

Jan 22, 2025 - This publication provides an overview of techniques used to compromise Active Directory, and recommended strategies to mitigate these techniques. By implementing the recommendations in this publication, organisations can significantly improve their Active Directory security, and therefore their overall network security posture.

How to protect yourself from malware   Guidance

Nov 10, 2023 - Malware (short for 'malicious software') is software that cybercriminals use to harm your computer system or network. Cybercriminals can use malware to gain access to your computer without you knowing, in targeted or broad-based attacks.

Security configuration guide: Samsung Galaxy S10, S20 and Note 20 devices   Publication

Oct 6, 2021 - ASD has developed this guide to assist Australian’s to understand risks when deploying Samsung Galaxy and Samsung Note devices and the security requirements that need to be met to allow them to handle classified data.

Multiple key vulnerabilities identified in Microsoft products   Alert

Oct 13, 2021 - Multiple key vulnerabilities were identified in Microsoft’s 12 October 2021 patch release. While all vulnerabilities addressed in this release are important to mitigate the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) wishes to highlight several vulnerabilities for priority consideration.

New guidance for mitigating risks from bulletproof hosting providers   News

Nov 20, 2025 - Get recommendations for ISPs and network defenders to counter cybercriminal activity enabled by bulletproof hosting providers without disrupting legitimate services.

Technical example: Application control   Publication

Dec 16, 2022 - Application control restricts the ability of an application to run or install on a device. Application control makes it harder for users to intentionally or unintentionally install unwanted or malicious software.

Guidelines for gateways   Advice

Dec 4, 2025 - This chapter of the Information security manual (ISM) provides guidance on gateways.

Technical example: Multi-factor authentication   Publication

Dec 16, 2022 - Multi-factor authentication (MFA) makes it harder for adversaries to use compromised user credentials to access an organisation’s systems. It is one of the most important cyber security measures an organisation can implement.

New guidance for organisations to strengthen their network infrastructure   News

Oct 15, 2025 - This guidance supports executive and technical staff of medium-to-large organisations and government entities to strengthen their organisation’s network infrastructure.

Essential Eight Assessment Guidance Package   News

Nov 23, 2022 - The Australian Signals Directorate has published updated guidance to help ensure consistent Essential Eight assessment across government and industry.

Secure your Wi-Fi and router   Guidance

Oct 29, 2024 - How to make your software, devices and networks harder to access and more resilient to attack.

Essential Eight explained   Publication

Nov 27, 2023 - This publication provides an overview of the Essential Eight.

Cloud computing security for tenants   Publication

Jan 18, 2024 - This publication is designed to assist an organisation’s cyber security team, cloud architects and business representatives to jointly perform a risk assessment and use cloud services securely.

2022-004: ASD's ACSC Ransomware Profile – ALPHV (aka BlackCat)   Advisory

Apr 14, 2022 - ALPHV (aka BlackCat, Noberus) is a ransomware variant first observed in late 2021, used by cybercriminals to conduct ransomware attacks against multiple sectors and organisations worldwide, including Australia.

Gateway security guidance package: Executive guidance   Publication

Jul 29, 2025 - The purpose of this guidance is to inform decision-makers at the executive level of their responsibilities, the appropriate considerations needed to make informed risk-based decisions, and to meet policy obligations when leading the design or consumption of their organisation’s gateway services.

Are your organisation’s edge devices secure?   News

Feb 5, 2025 - New publication series for executives and IT practitioners on how to secure edge devices.

Implementing certificates, TLS, HTTPS and opportunistic TLS   Publication

Oct 6, 2021 - Transport Layer Security (TLS) is a widely used encryption protocol which enables parties to communicate securely over the internet. Through the use of certificates and Public Key Infrastructure (PKI), parties can identify each other through a trusted intermediary and establish encrypted tunnels for the secure transfer of information.

End of support for Microsoft Windows and Microsoft Windows server   Publication

Sep 4, 2025 - Support for Microsoft Windows and Microsoft Windows Server users following the expiration of the specified servicing timeline.

2023 top routinely exploited vulnerabilities   Advisory

Nov 13, 2024 - This advisory provides details, collected and compiled by the authoring agencies, on the Common Vulnerabilities and Exposures (CVEs) routinely and frequently exploited by malicious cyber actors in 2023 and their associated Common Weakness Enumerations (CWEs). Malicious cyber actors exploited more zero-day vulnerabilities to compromise enterprise networks in 2023 compared to 2022, allowing them to conduct operations against high priority targets.
The authoring agencies strongly encourage vendors, designers, developers, and end-user organizations to implement the following recommendations, and those found within the Mitigations section of this advisory, to reduce the risk of compromise by malicious cyber actors.