CVE-2021-34518
mediumpriority · track · 28EPSS 0.024 · 84 %ileEURUUSEPSS · scored 2026-10-27
Microsoft Excel Remote Code Execution Vulnerability
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedMicrosoft Excel 2013 RT Service Pack 1msrc_csaf
15.0.5363.1000:Security Update:https://support.microsoft.com/kb/5001993
https://support.microsoft.com/kb/5001993 - FixedMicrosoft Excel 2013 Service Pack 1 (32-bit editions)msrc_csaf
15.0.5363.1000:Security Update:https://support.microsoft.com/kb/5001993
https://support.microsoft.com/kb/5001993 - FixedMicrosoft Excel 2013 Service Pack 1 (64-bit editions)msrc_csaf
15.0.5363.1000:Security Update:https://support.microsoft.com/kb/5001993
https://support.microsoft.com/kb/5001993 - FixedMicrosoft Excel 2016 (32-bit edition)msrc_csaf
16.0.5188.100:Security Update:https://support.microsoft.com/kb/5001977
https://support.microsoft.com/kb/5001977 - FixedMicrosoft Excel 2016 (64-bit edition)msrc_csaf
16.0.5188.1000:Security Update:https://support.microsoft.com/kb/5001977
https://support.microsoft.com/kb/5001977 - FixedMicrosoft Office Web Apps Server 2013 Service Pack 1msrc_csaf
15.0.5363.1000:Security Update:https://support.microsoft.com/kb/5001986
https://support.microsoft.com/kb/5001986
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.8–7.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (22)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- msrc_CVE-2021-34518Microsoft Excel Remote Code Execution Vulnerability2021-07-13csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34518cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-34518cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34518cnnvd
- https://vigilance.fr/vulnerability/Microsoft-Office-vulnerabilities-of-July-2021-35883cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021071359cnnvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34518enisa_euvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34518nvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34518PatchVendor Advisorynvd
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