Definition

Variants are new strains of malware that are modifications of a previous malware. Today’s cybercriminals continually modify malware in order to get as much mileage as possible from it.

A virus is a computer program that can copy itself and infect a computer without a user’s permission or knowledge.

Vishing refers to phishing attacks that involve the use of voice calls, using either conventional phone systems or Voice over Internet Procotol (VoIP) systems.

A vulnerability is a weakness in a system or device that can be exploited to allow unauthorized access, elevation of privileges or denial of service. A tool used to attack a vulnerability is called an exploit.