AgentsThe Decoder
KeyRank 78A security researcher built a self-spreading worm that hides inside Word docs and hijacks Microsoft Copilot
A demonstrated agent exploit — invisible prompt injections that propagate across documents and compromise Copilot's autonomy — exposes a critical reliability and security gap in deployed agentic systems. This is the kind of failure mode that will determine whether agents scale in enterprise.
2026-08-01
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