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How to update your device and software   Guidance

Jul 30, 2024 - Cybercriminals are always looking for easy paths to get onto your device. Updating your device and software is the easiest way reduce the risk of being a victim of cybercrime.

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.

2021 Top Malware Strains   Advisory

Aug 5, 2022 - This joint Cybersecurity Advisory (CSA) was coauthored by the Cybersecurity and Infrastructure Security Agency (CISA) and the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC).

Cyber security terminology   Advice

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

Phone and email scammers impersonating the ASD's ACSC   Alert

Jan 19, 2022 - The Australian government will NEVER phone you to request access to your computer, or request you to purchase cryptocurrencies or gift cards. If you receive a suspicious phone call, take the caller's details, hang up and contact the company they claim to represent via official communication channels listed on their website. Never call a number provided by the scammer.

Data breaches   Threat

Aug 30, 2023 - Sometimes personal information is released to unauthorised people by accident or as the result of a security breach. For example, an email with personal information can be sent to the wrong person, or a computer system can be hacked and personal information stolen. These are known as data breaches or data spills.

Protect yourself: Updates   Guidance

Oct 14, 2022 - Cybercriminals are always looking for easy paths to get onto your devices.

Bulletproof defense: mitigating risks from bulletproof hosting providers   Publication

Nov 20, 2025 - This document provides internet service providers (ISPs) and network defenders recommendations to mitigate potential cybercriminal activity enabled by bulletproof hosting (BPH) providers.

Protect yourself from scams  

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

Web conferencing security   Publication

Oct 6, 2021 - Web conferencing tools are essential for meeting with colleagues and clients online. This guide provides tips on how to choose a secure web conference provider, and what risks to be aware of.

People's Republic of China State-Sponsored Cyber Actor Living off the Land to Evade Detection   Advisory

May 25, 2023 - The People's Republic of China State-Sponsored Cyber Actor Living off the Land to Evade Detection joint advisory provides examples of the cyber actor’s commands, along with detection signatures to aid network defenders in hunting for this activity.

Don’t take BADCANDY from strangers – How your devices could be implanted and what to do about it   Advisory

Oct 31, 2025 - ASD recommends that system operators take the following actions to remove the BADCANDY implant if compromised and to mitigate the risk of re-exploitation.

2021 Top Routinely Exploited Vulnerabilities   Advisory

Apr 28, 2022 - This advisory provides details on the top 15 Common Vulnerabilities and Exposures (CVEs) routinely exploited by malicious cyber actors in 2021, as well as other CVEs frequently exploited.

End of support   Guidance

Jul 29, 2024 - ‘End of support’ is when software is no longer support by the product developer that makes it. It will no longer receive security updates, general software updates or technical support.

Important Vulnerabilities in Microsoft’s May 2023 Security Update   Alert

May 11, 2023 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) is concerned about vulnerabilities disclosed in Microsoft’s May 2023 Security Update. Government, businesses and individuals should patch their Microsoft products and apply any recommended mitigations.

Security tips for travelling   Guidance

Jul 29, 2024 - Learn how to stay secure while travelling with personal devices.

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.

2020-002: Critical Vulnerabilities for Microsoft Windows, Patch Urgently   Advisory

Jan 15, 2020 - If you or your organisation uses any of the affected products, the ACSC recommends that you apply the patches urgently.

Important Vulnerabilities in Microsoft’s July 2023 Security Update   Alert

Jul 13, 2023 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD's ACSC) is concerned about vulnerabilities disclosed in Microsoft’s July 2023 Security Update. Government, businesses and individuals should patch their Microsoft products and apply any recommended mitigations as soon as possible.

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.