What’s Vulnerable › Vulnerabilities

CVE-2021-27059: Microsoft Office Remote Code Execution Vulnerability

• Severity: high (CVSS 8.5 v2.0)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 6.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-11 · updated 2026-08-19

Description

Microsoft Office Remote Code Execution Vulnerability

Affected products

• Microsoft Office: 2010-sp2, 2013-sp1
• Microsoft Office 2016: all versions
• Microsoft Office 2013 Service Pack 1: from 15.0.0 before publication — fixed in publication
• Microsoft Office: from 13.0.0.0 before 14.0.7266.5000 — fixed in 14.0.7266.5000

How to fix

Upgrade to a fixed version: Microsoft Office 2013 Service Pack 1 publication; Microsoft Office 14.0.7266.5000. Check the vendor advisory for mitigations.

References

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

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