Source: Microsoft Security Blog
Author: Efim Hudis
URL: https://www.microsoft.com/en-us/security/blog/2026/03/30/addressing-the-owasp-top-10-risks-in-agentic-ai-with-microsoft-copilot-studio/
ONE SENTENCE SUMMARY:
Agentic AI shifts security from outputs to outcomes, requiring OWASP-driven controls, governance, and monitoring across identity, tools, data, and lifecycle.
MAIN POINTS:
- Production agentic systems can retrieve sensitive data, invoke tools, and take real-world actions.
- Failures become automated sequences with downstream impact, not isolated bad responses.
- Agentic risk merges application, identity, and data security into one operating model.
- Autonomy enables “working as designed” behavior that humans would not approve.
- OWASP created the 2026 Top 10 to address agentic security gaps beyond traditional guidance.
- Community-driven expert review informed the list, with Microsoft AI Red Team participation.
- Goal hijack and prompt/indirect injection can redirect agent plans via untrusted content.
- Tool misuse, privilege abuse, supply chain issues, and unexpected code execution expand attack surface.
- Memory poisoning, insecure inter-agent communication, cascading failures, trust exploitation, and rogue agents drive bad outcomes.
- Copilot Studio and Agent 365 aim to constrain behavior, provide visibility, enforce policy, and respond quickly.
TAKEAWAYS:
- Treat agents as privileged, auditable applications with scoped identities and permissions.
- Constrain actions and connectors to reduce tool misuse and unintended code execution.
- Protect long-lived memory, RAG stores, and context from poisoning and persistence attacks.
- Establish centralized governance and continuous monitoring to detect deviations and incidents quickly.
- Use OWASP Top 10 as a baseline to prioritize mitigations across the agent lifecycle.