CVE-2026-26107

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel (affected versions not specified) Microsoft Office Microsoft 365 Apps for Enterprise Microsoft Office Online Server

Description A use-after-free issue exists in Microsoft Office Excel, Microsoft Office, Microsoft 365 Apps for Enterprise, and Microsoft Office Online Server. This flaw could allow an unauthorized attacker to execute code locally. The vulnerability enables remote attackers to execute arbitrary code and affect the system. The issue involves the use of memory after it has been freed.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.