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Disclaimer  

Jan 13, 2026 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) publishes this website to distribute information to the public and government ICT security professionals. We regularly review and update the information provided.

Principles for the secure integration of Artificial Intelligence in Operational Technology   Publication

Dec 4, 2025 - This publication provides guidance for critical infrastructure owners and operators for integrating AI into operational technology (OT) environments. It outlines key principles to leverage the benefits of AI in OT systems while minimising risk.

Small business cyber security guide   Publication

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

Vulnerability Disclosure Program   News

Nov 23, 2022 - New ACSC publication released to help organisations implement a Vulnerability Disclosure Program.

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:

Mitigating Log4Shell and Other Log4j-Related Vulnerabilities   Advisory

Dec 23, 2021 - Malicious cyber actors are actively scanning networks to potentially exploit Log4Shell, CVE-2021-45046, and CVE-2021-45105 in vulnerable systems. According to public reporting, Log4Shell and CVE-2021-45046 are being actively exploited. This joint Cybersecurity Advisory is to provide mitigation guidance on addressing vulnerabilities.

Personal cyber security: First steps guide   Guidance

Apr 14, 2023 - The first of three cyber security guides in the personal cyber security series is designed to help everyday Australians understand a basic level of cyber security and how to take action to protect themselves from cyber threats.

Email hardening  

Oct 31, 2025 - This page lists publications on the hardening of message exchange via electronic mail.

Critical Unauthenticated Remote Code Execution vulnerability in n8n workflow automation platform   Alert

Jan 8, 2026 - A critical unauthenticated Remote Code Execution (RCE) vulnerability affecting n8n workflow automation platform has been observed. The critical vulnerability, tracked as CVE-2026-21858, allows unauthenticated threat actors to access sensitive files on the underlying server through execution of certain form-based workflows leading to RCE.

This vulnerability is assessed as CVSS 10.0.

Building cyber capability and resilience across the Asia Pacific region   News

Nov 6, 2025 - Working together to engage with international partners to drive cyber security uplift and cyber threat awareness.

Personal cyber security: Next steps guide   Guidance

Jun 16, 2023 - The second of three cyber security guides in the personal cyber security series is designed to help everyday Australians understand a moderate level of cyber security and how to take action to protect themselves from cyber threats.

Advisory 2020-017: Resumption of Emotet malware campaign   Advisory

Oct 30, 2020 - The Australian Signals Directorate’s Australian Cyber Security Centre (ACSC) has observed the resumption of an ongoing and widespread campaign of malicious emails designed to spread the Emotet malware across a variety of sectors in the Australian economy, including critical infrastructure providers and government agencies.

Cyber security best practices for smart cities   Publication

Apr 20, 2023 - This guidance is the result of a collaborative effort from the United States Cybersecurity and Infrastructure Security Agency (CISA), the United States National Security Agency (NSA), the United States Federal Bureau of Investigation (FBI), the United Kingdom National Cyber Security Centre (NCSC-UK), the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC), the Canadian Centre for Cyber Security (CCCS), and the New Zealand National Cyber Security Centre (NCSC-NZ).

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.

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.

#StopRansomware: BianLian Ransomware Group   Advisory

Nov 21, 2024 - The Federal Bureau of Investigation (FBI), Cybersecurity and Infrastructure Security Agency (CISA), and Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) are releasing this joint Cybersecurity Advisory to disseminate known BianLian ransomware and data extortion group IOCs and TTPs identified through FBI and ASD's ACSC investigations as of March 2023.

Joint cybersecurity advisory released on 2021's top routinely exploited vulnerabilities   News

Apr 28, 2022 - Malicious cyber actors are aggressively targeting newly-disclosed and dated critical software vulnerabilities against a broad range of targets, including public and private sector organisations worldwide.

Cyber security for charities and not-for-profits   Guidance

Sep 30, 2025 - How to avoid common cyber threats and protect your mission .

Iranian Government-Sponsored APT Cyber Actors Exploiting Microsoft Exchange and Fortinet Vulnerabilities in Furtherance of Malicious Activities   Advisory

Nov 22, 2021 - Iranian government-sponsored APT actors are actively targeting a broad range of victims across multiple U.S. critical infrastructure sectors, including the Transportation Sector and the Healthcare and Public Health Sector, as well as Australian organisations.

Choosing secure and verifiable technologies   Publication

Dec 5, 2024 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) and international partners have provided recommendations in this guide as a roadmap for choosing secure and verifiable technologies.