Typical severity: High. Likelihood of attack: High. An adversary targets users with a phishing attack for the purpose of soliciting account passwords or sensitive information from the user. Voice Phishing is a variation of the Phishing social engineering technique where the attack is initiated via a voice call, rather than email. The user is enticed to provide sensitive information by the adversary, who masquerades as a legitimate employee of the alleged organization. Voice Phishing attacks deviate from standard Phishing attacks, in that a user doesn't typically interact with a compromised website to provide sensitive information and instead provides this information verbally. Voice Phishing attacks can also be initiated by either the adversary in the form of a "cold call" or by the victim if calling an illegitimate telephone number.
Do not accept calls from unknown numbers or from numbers that may be flagged as spam. Also, do not call numbers that appear on-screen after being unexpectedly redirected to potentially malicious websites. In either case, do not provide sensitive information over voice calls that are not legitimately initiated. Instead, call your Bank, PayPal, eBay, etc., via the number on their public-facing website and inquire about the problem.