In the context of clause 6.1 actions to address risks and opportunities, the weakness of an asset or control that can be exploited by a threat is…

The definition provided, "the weakness of an asset or control that can be exploited by a threat," is the formal definition of a vulnerability. In the context of ISO 27001 Clause 6.1, understanding this term is fundamental to the risk assessment process. An organization must identify vulnerabilities in its assets and controls to determine how they could be exploited by potential threats. The combination of a threat exploiting a vulnerability results in an information security risk, which must then be analyzed and treated.

A: A threat is the potential cause of an unwanted incident (e.g., a malware attack), not the weakness that is exploited.

B: Risk is the effect of uncertainty on objectives, typically calculated from the likelihood of a threat exploiting a vulnerability and the resulting impact.

D: Impact refers to the adverse consequence or outcome for the organization if an information security incident occurs.

1. ISO/IEC 27000:2018, Information technology — Security techniques — Information security management systems — Overview and vocabulary, Section 3.73, Definition of "vulnerability".

2. ISO/IEC 27005:2022, Information security, cybersecurity and privacy protection — Guidance on managing information security risks, Section 6, "Information security risk identification process".

3. Von Solms, R., & van Niekerk, J. (2013). From information security to cyber security. Computers & Security, 38, 97-102. https://doi.org/10.1016/j.cose.2013.04.004 (This paper discusses the fundamental concepts of threat, vulnerability, and risk in the context of evolving security standards).