Transparency-in-Ai

0xensec Daily Roundup — April 19, 2026

Enterprise environments are confronting a sophisticated escalation in social engineering-driven intrusions. Microsoft Security has released an extensive playbook detailing a recent surge in cross-tenant impersonation attacks leveraging Microsoft Teams. In these incidents, adversaries impersonate IT or helpdesk personnel and initiate contact via external Teams messages—bypassing traditional email-based phishing vectors and embedding themselves directly into workflow communications trusted by employees[4].