Search

A fireside chat with Australia’s Big 4 Banks   News

Jan 23, 2026 - Hear from cyber leaders from Australia’s largest banks as they discuss the Annual Cyber Threat Report, and how they manage cyber threats at scale.

Microsoft Exchange ProxyShell Targeting in Australia   Alert

Aug 19, 2021 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) has observed targeting of the Microsoft Exchange ProxyShell vulnerability by Malicious actors.

Turn on multi-factor authentication  

Nov 9, 2022 - Protect your important accounts with extra login steps.

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).

Restricting Microsoft Office macros   Publication

Nov 27, 2023 - This publication has been developed to discuss approaches that can be applied by organisations to secure systems against malicious Microsoft Office macros while balancing both their business and security requirements.

#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.

Essential Eight assessment process guide   Publication

Oct 2, 2024 - This publication provides advice on how to assess the implementation of the Essential Eight.

Protect yourself from scams  

Feb 3, 2025 - Protect your accounts by recognising and reporting scams.

Critical vulnerability in Microsoft Windows Server Update Service (WSUS)   Alert

Oct 25, 2025 - Critical vulnerability impacting Microsoft Windows Server Update Service – CVE-2025-59287. ASD’s ACSC recommends organisations update affected products to the latest versions and follow the advice detailed in the Microsoft Security Update guide.

Microsoft Office Outlook Remote Code Execution Vulnerability   Alert

Feb 18, 2024 - ASD’s ACSC is aware of a vulnerability in Microsoft Office Outlook (CVE-2024-21413).
Users of Microsoft Office Outlook are strongly advised to follow the mitigation advice provided by Microsoft if they are vulnerable.

How to combat fake emails   Publication

Oct 6, 2021 - Organisations can reduce the likelihood of their domains being used to support fake emails by implementing Sender Policy Framework (SPF) and Domain-based Message Authentication, Reporting and Conformance (DMARC) records in their Domain Name System (DNS) configuration. Using DMARC with DomainKeys Identified Mail (DKIM) to sign emails provides further safety against fake emails. Likewise, organisations can better protect their users against fake emails by ensuring their email systems use and apply SPF, DKIM and DMARC policies on inbound email.

2020 Health Sector Snapshot   Reports and statistics

Feb 22, 2021 - This Sector Snapshot is designed to enhance awareness of key cyber security threats in the health sector and advise executives and cyber security professionals within the health sector on what they can do to protect their organisation from cyber threats. This report provides a high-level overview of the cyber security environment within the health sector over a twelve month period (1 January to 31 December 2020).

Iranian Islamic Revolutionary Guard Corps-Affiliated Cyber Actors Exploiting Vulnerabilities for Data Extortion and Disk Encryption for Ransom Operations   Advisory

Sep 15, 2022 - The Australian Signals Directorate's Australian Cyber Security Centre (ASD's ACSC) has joined with international cyber security agency partners to co-author an advisory on continued Iranian state-sponsored cyber threats. Organisations are encouraged to apply the recommended mitigations to protect themselves online.

Engaging with artificial intelligence   Publication

Jan 24, 2024 - The purpose of this paper is to provide organisations with guidance on how to use artificial intelligence (AI) systems securely. The paper summarises some important threats related to AI systems and includes cybersecurity mitigation strategies to aid organisations in engaging with AI while managing risk. It provides mitigations to assist both organisations that maintain their own AI systems and organisations that use third-party AI systems.

Advisory 2020-004: Remote code execution vulnerability being actively exploited in vulnerable versions of Telerik UI by sophisticated actors   Advisory

May 22, 2020 - This advisory is focused around the targeting of CVE-2019-18935 but has significant overlap to the previously released ACSC 2019-126 advisory.

Advisory 2021-002: Active exploitation of vulnerable Microsoft Exchange servers   Advisory

Mar 26, 2021 - On 2 March 2021 Microsoft released information regarding multiple exploits being used to compromise instances of Microsoft Exchange Server. Malicious actors are exploiting these vulnerabilities to compromise Microsoft Exchange servers exposed to the internet, enabling the malicious actor to access email accounts and to enable further compromise of the Exchange server and associated networks.

Page not found  

Jun 14, 2020 - Page not found for error 404

View all content  

Nov 3, 2022 -

CI Fortify   Publication

Oct 13, 2025 - Actionable guidance for CI operators to isolate and rebuild critical services and OT systems during crisis or service disruption.

Privacy  

Jan 13, 2026 - The cyber.gov.au website, including the cyber incident reporting portal (ReportCyber), is operated by the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC). The ASD's ACSC is part of the Australian Signals Directorate (ASD), an Australian Government agency.