CVE-2026-32199 is a use-after-free vulnerability (CWE-416) in Microsoft Office Excel component of Microsoft 365 Apps for Enterprise. It enables an unauthorized attacker to execute code locally by exploiting improper memory handling. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix and manages remediation for this cloud service. The affected version explicitly identified is 16.0.1.

Successful exploitation of this vulnerability allows an unauthorized attacker to execute arbitrary code locally on the affected system, potentially leading to full compromise of the affected Microsoft 365 Apps for Enterprise environment. The CVSS vector indicates low attack complexity, no privileges required, but user interaction is needed. The impact includes high confidentiality, integrity, and availability consequences.

An official fix is available from Microsoft. Users should apply the update provided by Microsoft to remediate this vulnerability. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32199 for detailed patching instructions and confirmation of remediation status.