CVE-2021-31175: Microsoft Office Graph Use-After-Free Remote Code Execution Vulnerability

Published May 11, 2021
·
Updated

Microsoft Office Remote Code Execution Vulnerability

Other sources

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Office. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the Graph COM object. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process.

Affected Software

27 affected componentsFixes available
Microsoft Excel 2013
Microsoft Excel 2013
Microsoft Office Online Server
Microsoft Office 2013
Microsoft Office 2013
Microsoft Excel 2013 RT
Microsoft Office Web Apps Server 2013
Microsoft Office 2019 for 32-bit editions
Microsoft Office 2019 for 64-bit editions
Microsoft Office
Microsoft Office 2016
Microsoft Office 2016
Microsoft 365 Apps for Enterprise
Microsoft 365 Apps for Enterprise
Microsoft 365 Apps
Microsoft Excel=2013-sp1
Microsoft Excel=2013-sp1
Microsoft Excel=2016
Microsoft Office=2013-sp1
Microsoft Office=2013-sp1
Microsoft Office=2016
Microsoft Office=2019
Microsoft Office Online Server
Microsoft Office Web Apps Server=2013-sp1
Microsoft Excel 2016
Microsoft Excel 2016
Microsoft Office 2013 RT

Event History

May 11, 2021
CVE Published
via Microsoft·07:00 AM
Data Sourced
via Microsoft·07:00 AM
DescriptionSeverityWeakness
CVE Published
via MITRE·07:11 PM
Data Sourced
via MITRE·07:11 PM
DescriptionSeverity
Feb 27, 2025
Advisory Published
via ZDI·05:00 AM
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Frequently Asked Questions

1

What is CVE-2021-31175?

CVE-2021-31175 is a vulnerability that allows remote attackers to execute arbitrary code on affected installations of Microsoft Office.

2

How severe is CVE-2021-31175?

CVE-2021-31175 has a severity rating of 7.8, which is considered high.

3

Which software versions are affected by CVE-2021-31175?

CVE-2021-31175 affects various versions of Microsoft Office, including 2013, 2016, 2019, and Microsoft 365 Apps for Enterprise.

4

Is user interaction required to exploit CVE-2021-31175?

Yes, user interaction is required to exploit CVE-2021-31175. The target must visit a malicious page or open a malicious file.

5

How can I fix CVE-2021-31175?

To fix CVE-2021-31175, update your Microsoft Office installation to the latest security patches provided by Microsoft.

Contact

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