CVE-2019-0541: Microsoft MSHTML Remote Code Execution Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 53.2% chance of exploitation in the next 30 days.

A remote code execution vulnerability exists in the way that the MSHTML engine inproperly validates input, aka "MSHTML Engine Remote Code Execution Vulnerability." This affects Microsoft Office, Microsoft Office Word Viewer, Internet Explorer 9, Internet Explorer 11, Microsoft Excel Viewer, Internet Explorer 10, Office 365 ProPlus.

Affected products

• Microsoft Excel Viewer: version 2007 only
• Microsoft Internet Explorer: version 11 only; version 9 only; version 10 only
• Microsoft Office: version 2010 only; version 2013 only; version 2016 only; version 2019 only
• Microsoft Office 365 Proplus: affected versions not specified
• Microsoft Office Word Viewer: affected versions not specified

Published 2019-01-08. Last modified 2026-06-17.