CVE-2021-43256: Microsoft Excel Remote Code Execution Vulnerability
Published Dec 15, 2021
·Updated
Microsoft Excel Remote Code Execution Vulnerability
Affected Software
15 affected components
Microsoft 365 Apps
Microsoft 365 Apps
Microsoft Excel=2013-sp1
Microsoft Excel=2013-sp1
Microsoft Excel=2016
Microsoft Excel=2016
Microsoft Excel Rt=2013-sp1
Microsoft Office=2019
Microsoft Office=2019
Microsoft Office=2021
Microsoft Office=2021
Microsoft Office Online Server
Microsoft Office Web Apps=2013-sp1
Microsoft Office Long Term Servicing Channel=2021
Microsoft Office Long Term Servicing Channel=2021
Remediation
Event History
Dec 15, 2021
CVE Published
via MITRE·02:15 PM
Data Sourced
via MITRE·02:15 PM
DescriptionSeverity
Data Sourced
via NVD·03:15 PM
RemedyDescriptionSeverityAffected Software
Frequently Asked Questions
1
What is CVE-2021-43256?
CVE-2021-43256 is a Microsoft Excel Remote Code Execution Vulnerability.
2
What software is affected by CVE-2021-43256?
Microsoft Office LTSC for Mac 2021, Microsoft Excel 2013 SP1, Microsoft Excel 2016, Microsoft Excel Rt, Microsoft Office 2019, Microsoft Office 2021, Microsoft Office Online Server, and Microsoft Office Web Apps are affected by CVE-2021-43256.
3
What is the severity of CVE-2021-43256?
CVE-2021-43256 has a severity rating of 7.8 (High).
4
How can I fix CVE-2021-43256?
Apply the latest security updates provided by Microsoft to mitigate CVE-2021-43256.
5
Where can I find more information about CVE-2021-43256?
You can find more information about CVE-2021-43256 on the Microsoft Security Guidance Advisory page: <https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43256>