CVE-2026-97010: CWE-416: Use After Free in Microsoft Microsoft 365 Apps for Enterprise

This vulnerability, identified as CVE-2026-97010, is a use-after-free condition in Microsoft Office Excel component of Microsoft 365 Apps for Enterprise. It enables remote code execution by an unauthorized attacker over a network. The CVSS 3.1 score of 8.8 reflects high impact on confidentiality, integrity, and availability. Microsoft has published an official security update to remediate this vulnerability. The affected versions include multiple builds of Microsoft 365 Apps for Enterprise prior to the fixed versions indicated by the vendor advisory.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code remotely, potentially leading to full compromise of the affected system. The impact affects confidentiality, integrity, and availability of the targeted system. No active exploitation has been reported to date.

An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97010. Since this is a cloud service, Microsoft manages remediation for the cloud-hosted components. No additional mitigation steps are indicated by the vendor.