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Multiple vulnerabilities were found in Microsoft Office. Malicious users can exploit these vulnerabilities to gain privileges, execute arbitrary code, spoof user interface.

Below is a complete list of vulnerabilities:

1. A remote code execution vulnerability in Microsoft Office Access Connectivity Engine can be exploited remotely via specially crafted file to gain privileges.
2. A remote code execution vulnerability in Microsoft Office Access Connectivity Engine can be exploited remotely via specially crafted file to execute arbitrary code.
3. A cross-site-scripting (XSS) vulnerability Microsoft Office SharePoint can be exploited remotely via specially crafted web to spoof user interface.
4. A remote code execution vulnerability in Microsoft Graphics Components can be exploited remotely via specially crafted file to execute arbitrary code.
5. A remote code execution vulnerability in Microsoft Excel can be exploited remotely via specially crafted file to execute arbitrary code.
6. A remote code execution vulnerability in Office can be exploited remotely via specially crafted to execute arbitrary code.

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.

Microsoft Office 2019 for 32-bit editions
Microsoft Office 2016 (32-bit edition)
Microsoft Office 2010 Service Pack 2 (64-bit editions)
Office 365 ProPlus for 64-bit Systems
Microsoft Office 2016 (64-bit edition)
Microsoft Office 2013 Service Pack 1 (32-bit editions)
Microsoft Office 2019 for 64-bit editions
Microsoft Office 2010 Service Pack 2 (32-bit editions)
Microsoft Office 2013 RT Service Pack 1
Microsoft Office 2013 Service Pack 1 (64-bit editions)
Office 365 ProPlus for 32-bit Systems
Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Server 2019
Microsoft SharePoint Foundation 2010 Service Pack 2
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
Microsoft SharePoint Server 2010 Service Pack 2
Microsoft Office 2016 for Mac
Microsoft Office 2019 for Mac
Microsoft Excel 2010 Service Pack 2 (64-bit editions)
Microsoft Excel 2016 (64-bit edition)
Microsoft Excel 2016 (32-bit edition)
Microsoft Excel 2013 Service Pack 1 (64-bit editions)
Microsoft Excel 2013 RT Service Pack 1
Microsoft Excel 2010 Service Pack 2 (32-bit editions)
Microsoft Excel 2013 Service Pack 1 (32-bit editions)
Microsoft SharePoint Foundation 2013 Service Pack 1

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)