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Scattered Spider   Advisory

Jul 30, 2025 - This joint Cybersecurity Advisory is in response to recent activity by Scattered Spider threat actors against the commercial facilities sectors, subsectors, and other sectors. This advisory provides tactics, techniques, and procedures (TTPs) obtained through FBI investigations as recently as June 2025

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.

Small business hub  

Jul 18, 2023 - How to protect your small business from common cyber threats.

Guidelines for cybersecurity roles   Advice

Sep 4, 2025 - This chapter of the Information security manual (ISM) provides guidance on cybersecurity roles.

Gateway security guidance package: Gateway operations and management   Publication

Jul 29, 2025 - This guidance is one part of a package of documents that forms the Australian Signals Directorate (ASD)’s Gateway security guidance package written for audiences responsible for the operation and management of gateways.

#StopRansomware: LockBit 3.0 Ransomware Affiliates Exploit CVE 2023-4966 Citrix Bleed Vulnerability   Advisory

Nov 29, 2023 - This joint Cybersecurity Advisory (CSA) is part of an ongoing #StopRansomware effort to publish advisories for network defenders that detail various ransomware variants and ransomware threat actors.

Choosing secure and verifiable technologies: Executive guidance   Publication

Dec 5, 2024 - This guide supports senior leaders to enable their organisations to understand their threat environment and make better-informed assessments and decisions to procure secure technologies.

Cyber security incident response planning: Executive guidance   Publication

Dec 12, 2024 - The Australian Signals Directorate (ASD) is responsible for monitoring and responding to cyberthreats targeting Australian interests. Reporting cybersecurity incidents to ASD ensures that timely assistance can be provided, if required. This may be in the form of investigations or remediation advice.

Personal cyber security: Advanced steps guide   Guidance

Mar 23, 2023 - The third and final cyber security guide in the personal cyber security series is designed to help everyday Australians understand an advanced level of cyber security and how to take action to protect themselves from cyber threats.

Cloud assessment and authorisation   Publication

Jan 18, 2024 - This publication is co-designed with industry to support the secure adoption of cloud services across government and industry.

Important Vulnerabilities in Microsoft’s June 2023 Security Update   Alert

Jun 15, 2023 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD's ACSC) is concerned about vulnerabilities disclosed in Microsoft’s June 2023 Security Update. Government, businesses and individuals should patch their Microsoft products and apply any recommended mitigations as soon as possible.

The Commonwealth Cyber Security Posture in 2024   Reports and statistics

Dec 5, 2024 - The Commonwealth Cyber Security Posture in 2024 informs the Australian Parliament on cyber security measures implemented across the Australian Government for the 2023–24 financial year.

People’s Republic of China (PRC) State-Sponsored Cyber Actor Living Off the Land to Evade Detection   Alert

May 25, 2023 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD's ACSC), in conjunction with the United States (US) National Security Agency (NSA) its international partners, has released a Cybersecurity Advisory regarding a PRC state-sponsored cyber actor conducting activity impacting US critical infrastructure (CI) sectors. Because of the potential risk to CI sectors outside the US, all organisations are encouraged to review the published Advisory and report any malicious activity to the ASD's ACSC.

BADBAZAAR and MOONSHINE: Spyware targeting Uyghur, Taiwanese and Tibetan groups and civil society actors   Advisory

Apr 9, 2025 - This advisory is jointly produced by government agencies from the UK, Australia, Canada, Germany, New Zealand, and the US and is supported by members of the NCSC’s Cyber League. Its purpose is to raise awareness about the growing threat that malicious cyber actors pose to individuals connected to topics including Taiwan, Tibet, Xinjiang Uyghur Autonomous Region, democracy movements and the Falun Gong.

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.

Multiple vulnerabilities present in the Spring Framework for Java   Alert

Apr 4, 2022 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) is aware of media reporting relating to multiple potential vulnerabilities, including the so-called SpringShell vulnerability, in the Java Spring framework and its execution environments. These vulnerabilities pose a threat to organisations running applications on the web which contain components using the Java Spring framework.

The Commonwealth Cyber Security Posture in 2023   Reports and statistics

Nov 16, 2023 - The Commonwealth Cyber Security Posture in 2023 informs Parliament on the implementation of cyber security measures across the Australian Government for the 2022–23 financial year. According to the Flipchart of PGPA Act Commonwealth entities and companies, as of 30 June 2023 the Australian Government comprised 100 non-corporate Commonwealth entities (NCEs), 72 corporate Commonwealth entities (CCEs) and 17 Commonwealth companies (CCs); totalling 189 Australian government entities.

Exploitation of Unitronics Programmable Logic Controllers (PLCs)   Alert

Dec 5, 2023 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD's ACSC) is concerned about global exploitation of Programmable Logic Controllers (PLC) and is aware of reports of compromise of these devices in Australia. These devices are present in a number of critical sectors such as water, energy, fuel and healthcare.

Australia joins US and UK to warn of 2021 Ransomware trends   News

Feb 10, 2022 - Ransomware continues to be a global threat, and cybercriminals using ransomware pose a significant risk to Australian organisations and households.

Advisory 2020-009: Recommendations to mitigate APT actors targeting health sector and COVID-19 essential services   Advisory

May 8, 2020 - The ACSC recommends that organisations in the health sector implement the following cyber security mitigations:

Meltdown and Spectre patches unsuitable for some security products   Advisory

Jan 11, 2020 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) is aware of reporting that a variety of security products (e.g. antivirus solutions) are incompatible with Microsoft's patches for the Meltdown and Spectre vulnerabilities.

National cyber security exercises for Australia’s electricity industry   News

Apr 30, 2020 - In November 2019, the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) coordinated a national cyber security exercise series in partnership with Australia’s electricity industry and government agencies.

Critical infrastructure  

Jul 22, 2024 - Technical advice and non-regulatory guidance for critical infrastructure.

Ten things to know about data security   Publication

May 16, 2024 - This publication has been developed to assist business owners and information technology managers, particularly those unfamiliar with cybersecurity, with ten things they should know about data security.

Small business cyber security guide   Publication

Jun 16, 2023 - This guide includes basic security measures to help protect your business against common cyber threats.

AI data security   Publication

May 23, 2025 - This publication provides essential data security guidance for organisations that develop and/or use AI systems, including businesses, government and critical infrastructure. It highlights the importance of data security in ensuring the accuracy and integrity of AI outcomes, and presents an in-depth examination of 3 areas of data security risks in AI systems: data supply chain, maliciously modified (poisoned) data, and data drift.

Small business Google Chromebook and ChromOS security guide   Guidance

Nov 12, 2024 - This publication was developed by the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) with technical input from Chrome Engineering.

Vulnerability disclosure programs explained   Publication

Dec 12, 2024 - A vulnerability disclosure program (VDP) is a collection of processes and procedures designed to identify, verify, resolve and report on vulnerabilities disclosed by people who may be internal or external to organisations. The importance of developing, implementing and maintaining a well thought-out VDP cannot be underestimated. It is an integral part of professional organisations’ business operations.

Gateway security guidance package: Gateway security principles   Publication

Jul 29, 2025 - Guidance written for audiences responsible for the procurement, operation and management of gateways.

Domain Name System security for domain resolvers   Publication

Oct 6, 2021 - This publication explores DNS security for recursive resolution servers. It also shares helpful strategies to reduce the risk of DNS resolver subversion or compromise.