cve 2026 68813

CVE-2026-68813 is an Excel information disclosure vulnerability addressed by Microsoft in the August 11, 2026 Office security updates. The fix applies to Microsoft 365 Apps, Office LTSC, Office 2021, Office 2024, and Office 2019 builds. For Windows administrators and IT teams, the practical response is to deploy the August Office updates for the channel in use and verify the installed build matches Microsoft's published revision. The vulnerability was listed in Microsoft's Security Update Guide at 7:00 a.m. Pacific time on August 11, with Office security release notes published the same day. This tag covers update deployment, build verification, and remediation steps for affected Office environments.