The June 2026 threat landscape is dominated by three converging attack patterns: Chinese and North Korean state-sponsored actors targeting software development pipelines and critical infrastructure through supply chain compromise and deep authentication-layer persistence; active exploitation of internet-exposed industrial control systems and Windows infrastructure via unauthenticated remote code execution vulnerabilities with public proof-of-concept code in circulation; and an emerging structural risk class targeting AI coding agents through indirect prompt injection, creating high-blast-radius lateral movement opportunities in developer environments with no established detection baseline. Immediate attention is required for CVE-2026-25939 (FUXA SCADA, CISA KEV, CVSS 9.8), the June 2026 Microsoft Patch Tuesday release including two unauthenticated RCE vectors and a BitLocker bypass with active PoC, the compromised axios npm package versions v1.14.1 and v0.30.4 embedded with a Remote Access Trojan, and Velvet Ant’s confirmed PAM and OpenSSH binary hijacking tradecraft targeting air-gapped Linux infrastructure. The AI agent attack surface (Agentjacking, NVIDIA/CrowdStrike DPU telemetry gap) requires architectural assessment now rather than deferral to vendor roadmap delivery.