Analysis · curated 26 Jul 2026
Microsoft Copilot Security Risks: What Enterprise Leaders Need to Know
First reported witness.ai
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Single-source analysis — first reported, latest, and curated coincide.
Why it matters
Microsoft Copilot is widely deployed across enterprises, so its exposure to prompt injection and data exfiltration gives defenders a concrete map of the risks to govern and mitigate.
An enterprise-focused analysis from Witness.ai on Microsoft Copilot security risks, discussing exposure classes such as prompt injection, data exfiltration, and jailbreak vulnerabilities affecting M365 Copilot deployments. The piece references real research including ASCII-smuggling prompt-injection tool-invocation attacks against M365 Copilot and adaptive LLM jailbreak techniques, alongside Microsoft's own governance guidance.