CVE-2026-32197 is a use-after-free vulnerability (CWE-416) in Microsoft Office Excel component of Microsoft 365 Apps for Enterprise. This vulnerability enables an unauthorized attacker to execute code locally by exploiting the use-after-free condition. The CVSS 3.1 base score is 7.8, indicating high severity, with attack vector local, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability. Microsoft has published an official fix and manages remediation for this cloud service. The affected version explicitly stated is 16.0.1.

Successful exploitation of this vulnerability could allow an unauthorized attacker to execute arbitrary code locally on the affected system, potentially leading to full compromise of confidentiality, integrity, and availability of the impacted application and data. The vulnerability requires local access and user interaction to exploit.

An official fix is available from Microsoft. Users of Microsoft 365 Apps for Enterprise should apply the security update provided by Microsoft as detailed in the vendor advisory (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32197). Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users should verify that their environment is updated accordingly.