Vishing

When MFA Becomes the Attack Surface: Synchronized Vishing, Real-Time Relay, and Authentication Trust Boundaries

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Analysis of synchronized vishing attacks bypassing MFA through real-time authentication orchestration Executive Summary Thesis: The ShinyHunters-branded vishing campaign (January 2026) demonstrates that multi-factor authentication is not a security primitive but a user experience optimization when the authentication flow itself can be compromised through real-time adversary-in-the-middle orchestration. Data: Okta documented custom phishing kits enabling synchronized vishing … Read more