Vulnerability disclosure

In the contexts of information technology and cybersecurity, a vulnerability is a behaviour or set of conditions present in a system, product, component, or service that violates an implicit or explicit security policy
Attackers exploit vulnerabilities to compromise confidentiality, integrity, availability, operation, or some other security property.
This document provides requirements and recommendations to vendors on the disclosure of vulnerabilities in products and services. Vulnerability disclosure enables users to perform technical vulnerability management as specified in ISO/IEC 27002:2013, 12.6.1.
Vulnerability disclosure helps users protect their systems and data, prioritize defensive investments, and better assess risk. The goal of vulnerability disclosure is to reduce the risk associated with exploiting vulnerabilities. Coordinated vulnerability disclosure is especially important when multiple vendors are affected.

Source: https://www.iso.org/standard/72311.html