Shadow AI cybersecurity risk is accelerating: Verizon’s 2026 DBIR found shadow AI detections rose fourfold in a year, with 45% of employees now regular AI users on corporate devices. Two-thirds of office professionals admit using AI tools against company policy, exposing source code, financial. Shadow AI has become the third most common non-malicious insider action detected in enterprise environments, a fourfold increase from the previous year, according to Verizon's 2026 Data.