First reported o365reports.com
Analysis · latest
First reported nhimg.org
Microsoft Copilot exposure: what it means for data governance teams
An NHIMG editorial, based on content published by Sentra, frames the Microsoft Copilot Chat exposure as a data-posture problem rather than an AI control failure: Copilot inherits user permissions and can summarize years of overshared Microsoft 365 content because it operates on access reality, not policy intent. The piece argues DSPM, classification accuracy, and access cleanup are prerequisites for secure AI adoption and offers practitioner guidance on inventorying AI-reachable content and reconciling sensitivity labels against actual exposure. Details →First reported cyberone.security
Managing Excessive Agency AI: Secure Your Organisation
CyberOne's blog explains the risk of excessive agency AI (OWASP LLM08), where autonomous agents such as Microsoft 365 Copilots are granted permissions beyond what they need, enabling data exfiltration, privilege escalation, and system instability. The piece argues traditional RBAC fails to constrain dynamic AI workflows and promotes behaviour-based monitoring and managed security services for governance. Details →First reported witness.ai
Microsoft Copilot Security Risks: What Enterprise Leaders Need to Know
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. Details →First reported petri.com
Copilot Didn’t Overshare Your Data. Your Permissions Did
Amy Babinchak argues that Microsoft 365 Copilot's tendency to surface confidential documents, emails, and SharePoint content is not a Copilot bug but a reflection of pre-existing permission sprawl — EEEU groups, broken inheritance, and unexpired sharing links — that plain-language prompts now make instantly discoverable. Citing Concentric AI research that 16% of business-critical data in the average tenant is overshared, the piece recommends restricting Copilot discovery from high-risk areas and using Purview and SharePoint Advanced Management to remediate. Details →First reported darkreading.com
AI-Generated Workflows Are a Silent Security Disaster
An opinion/commentary piece arguing that AI coding assistants used to generate Microsoft 365 automation (e.g., Power Automate workflows) create unreviewed permissions and data flows, citing an incident where an AI-generated workflow copied sensitive HR documents into a broadly accessible Teams channel. The piece frames this as a governance and oversight gap rather than presenting a specific reproducible exploit. Details →How the wire is made
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