From Voice Phishing to Credential Misuse: Examining the Growing Threats in UC Security

• Voice phishing on the rise: Attackers now use pretexts such as IT support calls and “email bombing” to secure user trust — with a shocking 72% success rate.
• Credential theft and MFA bypass: Phishing‑as‑a‑service offerings help threat actors hijack legitimate sessions, even when MFA is enabled.
• The UC attack surface expands: Platforms like Microsoft Teams are being weaponised for impersonation and unauthorised access.
• Defence strategies: Centralised logging, employee awareness, and phishing‑resistant MFA (like passkeys) are now essential to mitigating these risks.

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