What is vulnerability?

Answer Posted / pa

In computer security, the word vulnerability refers to a
weakness in a system allowing an attacker to violate the
confidentiality, integrity, availability [i.e (C.I.A)
NSTISSC's triangle], access control, consistency or audit
mechanisms of the system or the data and applications it
hosts. Vulnerabilities may result from bugs or design flaws
in the system. A vulnerability can exist either only in
theory, or could have a known exploit. Vulnerabilities are
of significant interest when the program containing the
vulnerability operates with special privileges, performs
authentication or provides easy access to user data or
facilities (such as a network server or RDBMS).

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