AnalysisPublished 19 Feb 2021

Active Cyber Defence (ACD) · The Third Year

Source NCSC UK

Description

The year three report covers 2019 and aims to highlight the achievements and efforts made by the Active Cyber Defence programme.

Impact

This report does not describe a specific vulnerability or exploit but rather documents the positive impact of the ACD programme's defensive measures in reducing cyber threats in the UK. There are no known exploits or direct threats described in this content.

Defensive guidance

No direct mitigation actions are required by users or organisations based on this report. The ACD programme itself implements automated and scalable defensive measures. Organisations should continue to follow guidance from the NCSC and consider adopting recommended security standards such as DMARC as part of their email security posture.

Summary

The ACD programme is designed to protect the majority of UK users from cyber harm by proactively removing malicious content and improving security standards. The 2019 report details ongoing services like the Takedown Service, which reduces malicious internet content, and efforts to increase DMARC adoption to secure email. Additionally, a prototype for detecting subdomain hijacking vulnerabilities was developed. These efforts collectively aim to reduce cyber threats at scale through automation and collaboration with organisations.

References

ncsc.gov.uk/report/acd-report-year-three (opens in a new tab)

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Description

AI analysisMachine-generated, updated 26 May 2026, 20:37 UTC

References

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