CVE-2018-8331: Microsoft Excel

High severity, CVSS 7.8. EPSS: 19.5% chance of exploitation in the next 30 days.

A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka "Microsoft Excel Remote Code Execution Vulnerability." This affects Microsoft Office.

Affected products

• Microsoft Excel: affected versions not specified
• Microsoft Office: version 2016 only

Published 2018-09-13. Last modified 2026-06-17.