Cheryl is worried about VoIP phones used in her company because of the use of SMS as part of their multifactor authentication rollout. Which of the following types of attack should she be concerned about?

Cheryl should be concerned that attackers might be able to redirect short message service (SMS) messages sent to VoIP phones. This potential issue is one reason that some multifactor deployments do not allow SMS messages to be sent to VoIP phones in the environment, and some organizations do not allow SMS as an option, instead of requiring hardware tokens or application-based multifactor authentication. Vishing is a type of phishing done via voice, voicemail hijacking would redirect voicemail to another mailbox by forwarding calls, and weak multifactor code injection was made up for this question.