Your AI Copilot Is the Newest Attack Surface

Four 2026 incidents involving Excel Copilot, Chrome Gemini, Microsoft Copilot Personal, and Perplexity Comet revealed a common architectural issue: AI agents inherit extensive permissions (such as file access, network egress, credential autofill, and camera/microphone access) and cannot reliably distinguish legitimate user instructions from attacker-injected content, enabling zero-click exfiltration, session hijacking, and full credential vault takeover through indirect prompt injection (OWASP LLM01:2025). While all four vulnerabilities have been patched, the structural gap persists: 83% of organizations plan to deploy agentic AI, yet only 29% feel prepared to secure it. Security teams should enforce outbound network restrictions on AI-enabled applications, audit agent permission scopes to ensure least privilege, and treat untrusted data sources (documents, calendar invites, and URLs) as potential injection vectors in any agentic workflow.