CVE-2021-27059

Microsoft Office Remote Code Execution

7.6 HIGHActively exploited (CISA KEV)EPSS 6.08%

Published11 Mar 2021
Added to CISA KEV3 Nov 2021
Remediation due17 Nov 2021

Description

Microsoft Office Remote Code Execution Vulnerability

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityHigh

Privileges requiredHigh

User interactionRequired

ScopeChanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

Affected products

Microsoft Office2010 · 2013

Microsoft Office 2016all versions

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

Patch & vendor advisories

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27059PatchVendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27059PatchVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27059US Government Resource

Frequently asked

Is CVE-2021-27059 being actively exploited?

Yes. CVE-2021-27059 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2021-27059?

CVE-2021-27059 has a CVSS 3.1 base score of 7.6, rated high. EPSS estimates a 6.08% probability of exploitation.

Which products are affected by CVE-2021-27059?

Affected products include Microsoft Office, Microsoft Office 2016.

How do I fix CVE-2021-27059?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2021-27059 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.