CVE-2021-27053

Microsoft Excel Remote Code Execution Vulnerability

Description

Microsoft Excel Remote Code Execution Vulnerability

7.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 4.10% Top 15%

Vendor Advisory microsoft.com

Affected: Microsoft Microsoft Office 2019

Affected: Microsoft Microsoft Office Online Server

Affected: Microsoft Microsoft 365 Apps for Enterprise

Affected: Microsoft Microsoft Excel 2016

Affected: Microsoft Microsoft Excel 2010 Service Pack 2

Affected: Microsoft Microsoft Excel 2013 Service Pack 1

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

References

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27053	patch vendor advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-332/	third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2021-27053?: CVE-2021-27053 has been scored as a high severity vulnerability.
How to fix CVE-2021-27053?: To fix CVE-2021-27053, 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-2021-27053 being actively exploited in the wild?: It is possible that CVE-2021-27053 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-27053?: CVE-2021-27053 affects Microsoft Microsoft Office 2019, Microsoft Microsoft Office Online Server, Microsoft Microsoft 365 Apps for Enterprise, Microsoft Microsoft Excel 2016, Microsoft Microsoft Excel 2010 Service Pack 2, Microsoft Microsoft Excel 2013 Service Pack 1, Microsoft Microsoft Office Web Apps Server 2013 Service Pack 1.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.