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High Severity Vulnerability present in Microsoft Outlook for Windows   Alert

Mar 29, 2023 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) is aware of a Microsoft Outlook for Windows vulnerability. All Australian organisations using all versions of Microsoft Outlook for Windows should apply the available patch immediately.

Iranian Government-Sponsored APT Cyber Actors   Alert

Nov 17, 2021 - FBI and CISA have observed an Iranian government-sponsored APT group that are exploiting vulnerabilities to gain access to systems. The APT group has exploited the same Microsoft Exchange vulnerability in Australia.

Scammers impersonating police to target victims for cryptocurrency/seed wallet theft   Alert

Nov 13, 2025 - The ASD’s ACSC is aware that criminals are using Australia’s national cybercrime reporting channel and impersonating police to try to scam Australians out of funds from their cryptocurrency or seed wallets.

Marketing and filtering email service providers   Publication

Oct 6, 2021 - This publication provides high level guidance on how to use email service providers (ESPs) in particular deployment scenarios. The considerations and controls described in that publication also apply to ESPs sending email on other organisations’ behalf.

Detecting and mitigating Active Directory compromises   Publication

Jan 22, 2025 - This publication provides an overview of techniques used to compromise Active Directory, and recommended strategies to mitigate these techniques. By implementing the recommendations in this publication, organisations can significantly improve their Active Directory security, and therefore their overall network security posture.

Exchange server critical vulnerabilities   Alert

Apr 15, 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 access to email accounts and to enable further compromise of the Exchange server and associated networks.

Safe software deployment: How software manufacturers can ensure reliability for customers   Publication

Oct 25, 2024 - It is critical for all software manufacturers to implement a safe software deployment program supported by verified processes, including robust testing and measurements.

Multiple vulnerabilities in Jenkins products   Alert

Jan 30, 2024 - ASD’s ACSC is aware of multiple vulnerabilities impacting Jenkins products including CVE 2024-23897 (Critical) & CVE-2024-23898 (High). Organisations using Jenkins products are strongly advised to follow the mitigation advice provided by Jenkins and patch affected versions.

Hardening Linux workstations and servers   Publication

Nov 27, 2023 - This publication has been developed to assist organisations in understanding how to harden Linux workstations and servers.

Contact us  

Feb 25, 2023 - Contact ASD's ACSC for general enquiries and media enquiries.

Remote working  

Jul 30, 2024 - This page lists publications on working securely when away from the office environment.

Managed service providers  

Apr 11, 2023 - This page lists publications on the provision and use of managed services.

Vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway products   Alert

Jan 18, 2024 - ASD’s ACSC is aware of multiple vulnerabilities (CVE-2023-6548 and CVE-2023-6549) in Citrix NetScaler products (NetScaler ADC and NetScaler Gateway). Organisations are strongly encouraged to take immediate action to ensure affected instances are patched.

COVID-19 themed malicious cyber activity   Advisory

Mar 27, 2020 - This update is designed to raise awareness of increasing COVID-19 themed malicious cyber activity, and provide practical cyber security advice that organisations and individuals can follow to reduce the risk of being impacted.

Quantum  

Dec 15, 2025 - This page lists publications to help your organisation factor specific quantum technologies into its cyber security plans.

Deploying AI systems securely   Publication

Apr 16, 2024 - AI security is a rapidly evolving area of research. As agencies, industry, and academia discover potential weaknesses in AI technology and techniques to exploit them, organizations will need to update their AI systems to address the changing risks, in addition to applying traditional IT best practices to AI systems.

Securing Customer Personal Data for Small to Medium Businesses   News

Nov 17, 2023 - As data breaches increasingly impact Australian businesses and their customers, it’s crucial for businesses to improve their data security practices and ensure their customers’ personal data is handled appropriately.

Critical vulnerability in Pulse/Ivanti Connect Secure, Policy Secure and Neurons for ZTA gateways (CVE-2025-22457)   Alert

Apr 4, 2025 - Ivanti have released information regarding active exploitation of a critical vulnerability in Ivanti Connect Secure, Policy Secure and Neurons for ZTA gateways (CVE-2025-22457). ASD’s ACSC recommends customers follow the advice contained in Ivanti’s Security Advisory and assess their environments for malicious activity.

Enhanced visibility and hardening guidance for communications infrastructure   Advisory

Dec 4, 2024 - This guide provides network engineers and defenders of communications infrastructure with best practices to strengthen their visibility and harden their network devices against successful exploitation carried out by PRC-affiliated and other malicious cyber actors.

TMUI remote code execution vulnerability - CVE-2020-5902   Alert

Jul 6, 2020 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) advises users of F5’s enterprise and data centre BIG-IP products to ensure their systems are promptly patched after the recent disclosure of new remote code execution vulnerability.