KLA12255 Multiple vulnerabilities in Microsoft Office

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

Below is a complete list of vulnerabilities:

1. A spoofing vulnerability in Microsoft SharePoint Server can be exploited remotely to to spoof user interface.
2. A remote code execution vulnerability in Microsoft Office can be exploited remotely to execute arbitrary code.
3. A remote code execution vulnerability in Microsoft Word can be exploited remotely to execute arbitrary code.

Original advisories

CVE-2021-36940

CVE-2021-34478

CVE-2021-36941

Related products

Microsoft-Office-PowerPoint

Microsoft-Excel

Microsoft-Word

CVE list

CVE-2021-36940 unknown

CVE-2021-34478 unknown

CVE-2021-36941 unknown

KB list

4011600

5002000

5002002

Solution

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

Impacts

• ACE

Arbitrary code execution. Exploitation of vulnerabilities with this impact can lead to executing by abuser any code or commands at vulnerable machine or process.

• SUI

Spoof user interface. Exploitation of vulnerabilities with this impact can lead to changes in user interface to beguile user into inaccurate behavior.

Affected Products

• Microsoft Word 2016 (64-bit edition)Microsoft Office 2013 RT Service Pack 1Microsoft SharePoint Foundation 2013 Service Pack 1Microsoft SharePoint Server 2019Microsoft SharePoint Enterprise Server 2016Microsoft Word 2016 (32-bit edition)Microsoft Office 2019 for 64-bit editionsMicrosoft Office 2013 Service Pack 1 (64-bit editions)Microsoft Office 2016 (64-bit edition)Microsoft 365 Apps for Enterprise for 64-bit SystemsMicrosoft Office 2019 for MacMicrosoft Office Online ServerMicrosoft SharePoint Enterprise Server 2013 Service Pack 1Microsoft Excel 2013 Service Pack 1 (64-bit editions)Microsoft Excel 2013 RT Service Pack 1Microsoft Office 2019 for 32-bit editionsMicrosoft Office 2013 Service Pack 1 (32-bit editions)Microsoft Excel 2013 Service Pack 1 (32-bit editions)Microsoft Excel 2016 (32-bit edition)Microsoft Excel 2016 (64-bit edition)Microsoft Office 2016 (32-bit edition)Microsoft 365 Apps for Enterprise for 32-bit SystemsMicrosoft Office Web Apps Server 2013 Service Pack 1