Security bug

A security bug or security defect is a software bug that can be exploited to gain unauthorized access or privileges on a computer system. Security bugs introduce security vulnerabilities by compromising one or more of:

• Authentication of users and other entities^[1]
• Authorization of access rights and privileges^[1]
• Data confidentiality
• Data integrity

Security bugs do not need be identified nor exploited to be qualified as such and are assumed to be much more common than known vulnerabilities in almost any system.