tenfold Software Issues Guidance on Secure Microsoft 365 File Sharing and Access Reviews

Microsoft 365 facilitates easy file sharing within organizations, but a common security challenge is that access permissions often persist long after their original purpose has ended. This creates 'stale permissions' that leave sensitive data accessible to users who no longer require it, reducing visibility for security teams and increasing the attack surface. tenfold Software, in a recent advisory, explains that without centralized access governance, organizations have little visibility into who can still reach sensitive data. The guidance outlines strategies for implementing centralized access governance and conducting owner-driven access reviews. By regularly reviewing and removing unnecessary permissions, organizations can reduce the risk of unauthorized access and limit potential data exposure. The advisory emphasizes that this is a configuration and governance issue rather than a software vulnerability requiring a patch. No active exploitation of Microsoft 365 features has been reported in connection with this guidance. The advisory is intended for IT administrators and security teams responsible for Microsoft 365 tenant configuration and access management.