Key Point: AI agent skills with broad access rights become an attack surface for cybercriminals and require strict validation and restriction.
ESET has identified a new attack surface in AI agents: malicious skills can abuse broad access rights. CISOs must secure AI agent environments accordingly.
AI skills extend AI agents with additional functionality and data access. However, these extensions pose a risk if they are compromised or maliciously designed. Criminal actors view them as an attractive target because skills typically receive and can exercise comprehensive access rights to systems, data and APIs.
The core risk lies in the trust chain: agents execute skills without fully validating or restricting their permissions. A compromised or manipulated skill could thus gain access to confidential data, configure systems or perform actions on behalf of users.
CISOs should implement measures to validate and isolate skills when implementing AI agents, enforce access control on a least-privilege basis, and verify the origin and authenticity of skills before they are deployed in production environments.
Source: itwelt.at · Published 9 July 2026
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