Why Vendor Security Questionnaires Don’t Work (And What Actually Does)

This blog argues that traditional vendor security questionnaires are insufficient for modern third‑party risk management—citing 2025 data showing high third‑party breach rates and five structural failures of self‑reported, periodic assessments—and recommends continuous external monitoring (external attack surface, dark web credential exposure, threat‑actor targeting, vulnerability intelligence, and leak‑site monitoring) as the operational and compliance (DORA‑ready) complement; it explains how Brandefense’s platform delivers those monitoring layers.