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Interactive tools and advice to boost your online safety.
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Common online security risks and advice on what you can do to protect yourself.
Respond to cyber threats and take steps to protect yourself from further harm.
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Threat Actors Exploit Multiple Vulnerabilities in Ivanti Connect Secure and Policy Secure Gateways Advisory
Feb 28, 2024 - The Cybersecurity and Infrastructure Security Agency (CISA), Federal Bureau of Investigation (FBI), Multi-State Information Sharing & Analysis Center (MS-ISAC), Australian Signals Directorate’s Australian Cyber Security Center (ASD’s ACSC), and the UK’s National Cyber Security Centre (NCSC), are releasing this joint Cybersecurity Advisory (CSA) in response to the active exploitation of CVE-2023-46805, CVE-2024-21887, CVE-2024-22024, and CVE-2024-21893—multiple vulnerabilities affecting Ivanti Connect Secure and Ivanti Policy Secure gateways.
Feb 25, 2023 - Contact ASD's ACSC for general enquiries and media enquiries.
Protect yourself online: A guide to cybersecurity for young people Guidance
May 2, 2024 - The steps in this guide can help you navigate the online world with confidence.
Ransomware Threat
Read through the following case studies and learn from other Australians about how ransomware has affected them.
Ransomware Playbook Guidance
Oct 10, 2024 - This interactive guide is here to assist you with taking all of the appropriate steps to prepare for, respond to and recover from a ransomware incident.
Report a cyber security incident Service
If you are reporting fraud or cybercrime, please refer to the ReportCyber – Cybercrime page.
Protect your children online: A guide to cybersecurity for parents and carers Guidance
May 2, 2024 - The steps in this guide can help you ensure that your children stay safe and secure online.
New advisory – PRC state-sponsored actors compromise networks worldwide to feed global espionage system News
Aug 28, 2025 - Don’t feed their global espionage systems – read the full advisory for vital insights on threat hunting, indicators of compromise, and mitigation strategies to help your organisation safeguard your networks and assets.
Guidelines for communications infrastructure Advice
Sep 4, 2025 - This chapter of the Information security manual (ISM) provides guidance on communications infrastructure.
Joint advisory released on recent activity by Scattered Spider threat actors News
Jul 30, 2025 - Read about the tactics, techniques and procedures (TTPs) recently used by Scattered Spider threat actors against the commercial facilities sector and subsectors.
Domain Name System security for domain owners Publication
Oct 6, 2021 - This publication provides information on DNS security for domain owners. It also shared helpful strategies to reduce the risk of domain misuse.
Russian GRU targeting Western logistics entities and technology companies News
May 22, 2025 - We have released a joint advisory outlining the tactics, techniques and procedures of a Russian state-sponsored cyber campaign targeting Western logistics entities and technology companies.
Are you protected against ‘fast flux’? News
Apr 4, 2025 - Bulletproof Hosting Providers are using ‘fast flux’ to cycle quickly through bots and DNS records to bypass detection by network defenders and law enforcement agencies.
Cyber threat actors compromising networks of major global telecommunications providers News
Dec 4, 2024 - New guidance is available for network defenders of communications infrastructure to strengthen visibility and harden devices against PRC-affiliated and other malicious cyber actors.
Increase in denial-of-service (DoS) attacks against Australian organisations Advisory
Mar 17, 2025 - ASD's ACSC is aware of an increase in denial-of-service (DoS) attacks, where malicious actors flood websites with internet traffic, making it difficult for legitimate users to access them.
Guidelines for system management Advice
Dec 4, 2025 - This chapter of the Information security manual (ISM) provides guidance on system management.
PRC state-sponsored cyber group APT40’s expanding tradecraft and tactics News
Jul 9, 2024 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) has released a new joint advisory with international partners on the People’s Republic of China (PRC) Ministry of State Security (MSS) tradecraft in action.
How to dispose of your device securely Guidance
May 18, 2022 - You should consider that any devices you dispose of could be accessed by strangers.
Sextortion campaign - What to do if you receive the email Advisory
Apr 16, 2020 - In most cases, there is no reason to be concerned. These emails are typically generated in their thousands by online scammers using limited personal details, with the aim of intimidating recipients into paying the ransom.
Revised patch released to disable mitigation against Spectre variant 2 Advisory
Jan 29, 2020 - Intel has confirmed that the microcode updates designed to mitigate Spectre variant 2 (CVE-2017-5715: Branch Target Injection) have introduced an increased risk of system instability, data loss and corruption.
