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One does not simply defend agentically ↗ source

September 21, 2026 NCSC Guidance

Summary

Defenders can’t use AI in the same way attackers can, but there’s much they can do to unlock the potential of agentic One of my favourite cyber security maxims is Halvar Flake’s observation that “All offensive problems are technical problems, and all defensive problems are political problems”. For an attacker conducting offensive cyber actions, the problems that need to be solved are largely technical. They might ‘Do I have an exploit for this vulnerability?’ Whilst defenders also have technical challenges, they mostly wrestle with what Halvar describes as ‘political’ problems (which for the purposes of this discussion can be framed as organisational problems). Problems such as: ‘Can we get budget to replace this end-of-life system or invest in a more secure option?’ ‘How do I get IT operations to make time for patching?’ ‘How do we get a change request to put in firewall rules approved?’ In other words, defenders are most restricted by their organisational policies, whilst most attackers are restricted by technical hurdles. The reason for this difference becomes clear when you compare the core purposes of attackers and For attackers, their core purpose is ‘to conduct cyber offence’ and success will cause their employer to profit. Whether that’s stealing money from organisations, extorting victims, or exfiltrating information.

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CVEs Referenced in This Publication

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Vendors Named in This Publication

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