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Countering Chinese State-Sponsored Actors Compromise of Networks Worldwide to Feed Global Espionage System   Advisory

Aug 28, 2025 - This joint cyber security advisory gives vital insights on People’s Republic of China (PRC) state-sponsored cyber threat actors, how they gain and maintain persistent access, and the capabilities they have. It provides threat hunting guidance and mitigation strategies to help safeguard your networks.

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.

Junos OS 22.3R1 for EX4400-24T, EX4400-24P, EX4400-24MP, EX4400-48T, EX4400-48P, EX4400-48MP, EX4400-48F, QFX5120-48YM and ACX5448-M  

Nov 29, 2022 - Product evaluation of a series of network appliance models from the EX4400 Series and QFX5120-48YM and ACX5448-M switches.

2022 Top Routinely Exploited Vulnerabilities   Advisory

Aug 4, 2023 - This advisory provides details on the Common Vulnerabilities and Exposures (CVEs) routinely and frequently exploited by malicious cyber actors in 2022 and the associated Common Weakness Enumeration(s) (CWE).

Strategies to mitigate cybersecurity incidents: Mitigation details   Publication

Feb 1, 2017 - The Australian Signals Directorate (ASD) has developed prioritised mitigation strategies to help cybersecurity professionals in all organisations mitigate cybersecurity incidents caused by various cyberthreats. This guidance addresses targeted cyber intrusions (i.e. those executed by advanced persistent threats such as foreign intelligence services), ransomware and external adversaries with destructive intent, malicious insiders, ‘business email compromise’, and industrial control systems.

Protect yourself: Multi-factor authentication   Guidance

Dec 5, 2025 - Multi-factor authentication (MFA) is when you use two or more different types of actions to verify your identity.

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 Alert – 2 new Vulnerabilities associated with Microsoft Exchange.   Alert

Oct 10, 2022 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) is aware of 2 zero day vulnerabilities associated with Microsoft Exchange Servers 2013, 2016 and 2019 (Exchange).

Alerts and advisories  

Jan 30, 2023 - Find the latest in cybersecurity alerts and advisories

Archived Alerts and Advisories  

Jan 23, 2025 - Search archived cyber security alerts and advice

Secure your social media   Guidance

Jul 29, 2024 - Keep your social media secure by using these tips. Learn how to protect your accounts, privacy and information.

ISM OSCAL releases  

Mar 2, 2023 - List of current and previous ISM releases in the OSCAL format.

Educational pack for seniors   Guidance

Jun 23, 2023 - This educational pack provides engaging content to help seniors learn how to stay cyber secure. Practical steps and topics range from a basic to advanced level.

Microsoft Exchange Server security best practices   Publication

Oct 31, 2025 - This paper—authored by the National Security Agency (NSA), Cybersecurity and Infrastructure Security Agency (CISA), Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC), and Canadian Centre for Cyber Security (Cyber Centre)—provides security best practices for administrators on hardening on-premises (on-prem) Exchange.

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.

Small business hub  

Sep 30, 2025 - How to protect your small business from common cyber threats.

Potential SolarWinds Orion compromise   Alert

Jan 25, 2021 - FireEye identifies global campaign leveraging malicious updates to SolarWinds software.

Secure your mobile phone   Guidance

Nov 12, 2024 - The security of your mobile phone can be as crucial as your computer. Follow these steps to protect your phone or tablet from cybercriminals.

Guidelines for software development   Advice

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

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.