CVE-2021-28453

Microsoft Word Remote Code Execution Vulnerability

Description

Microsoft Word Remote Code Execution Vulnerability

7.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 2.08% Top 20%

Vendor Advisory microsoft.com

Affected: Microsoft Microsoft SharePoint Enterprise Server 2016

Affected: Microsoft Microsoft SharePoint Enterprise Server 2013 Service Pack 1

Affected: Microsoft Microsoft SharePoint Server 2019

Affected: Microsoft Microsoft Office 2019

Affected: Microsoft Microsoft Office 2019 for Mac

Affected: Microsoft Microsoft Office Online Server

Affected: Microsoft Microsoft 365 Apps for Enterprise

Affected: Microsoft Microsoft Word 2016

Affected: Microsoft Microsoft Office 2010 Service Pack 2

Affected: Microsoft Microsoft Office Web Apps 2010 Service Pack 2

Affected: Microsoft Microsoft Office Web Apps Server 2013 Service Pack 1

Affected: Microsoft Microsoft SharePoint Server 2010 Service Pack 2

Affected: Microsoft Microsoft Word 2010 Service Pack 2

Affected: Microsoft Microsoft Word 2013 Service Pack 1

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28453	patch vendor advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-423/	third party advisory vdb entry

What is the severity of CVE-2021-28453?: CVE-2021-28453 has been scored as a high severity vulnerability.
How to fix CVE-2021-28453?: To fix CVE-2021-28453, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-28453 being actively exploited in the wild?: It is possible that CVE-2021-28453 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-28453?: CVE-2021-28453 affects Microsoft Microsoft SharePoint Enterprise Server 2016, Microsoft Microsoft SharePoint Enterprise Server 2013 Service Pack 1, Microsoft Microsoft SharePoint Server 2019, Microsoft Microsoft Office 2019, Microsoft Microsoft Office 2019 for Mac, Microsoft Microsoft Office Online Server, Microsoft Microsoft 365 Apps for Enterprise, Microsoft Microsoft Word 2016, Microsoft Microsoft Office 2010 Service Pack 2, Microsoft Microsoft Office Web Apps 2010 Service Pack 2, Microsoft Microsoft Office Web Apps Server 2013 Service Pack 1, Microsoft Microsoft SharePoint Server 2010 Service Pack 2, Microsoft Microsoft Word 2010 Service Pack 2, Microsoft Microsoft Word 2013 Service Pack 1, Microsoft Microsoft Word 2013 Service Pack 1 .