This vulnerability (CVE-2026-70316) in Microsoft Office PowerPoint within Microsoft 365 Apps for Enterprise is due to improper input validation (CWE-20). It allows an unauthorized attacker to disclose information locally. The CVSS 3.1 base score is 5.5 (medium), with an attack vector of local, low attack complexity, no privileges required, and user interaction needed. The confidentiality impact is high, while integrity and availability are unaffected. Microsoft has released an official fix and manages remediation for this cloud service. The affected version explicitly stated is 16.0.1.

An attacker can exploit improper input validation to disclose sensitive information locally on a system running the affected version of Microsoft 365 Apps for Enterprise PowerPoint. There is no impact on system integrity or availability. Exploitation requires local access and user interaction, and no known exploits are currently in the wild.

An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users and administrators should apply the official update as provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70316 to mitigate this vulnerability.