Microsoft MSHTML Remote Code Execution Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 03/11/2021. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| excel viewer | = 2007 | |
| internet explorer | = 10= 11= 9 | |
| office | = 2010= 2013= 2016= 2019 |
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.
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