What’s Vulnerable › Vulnerabilities

CVE-2021-34469: Microsoft Office Security Feature Bypass Vulnerability

• Severity: medium (CVSS 5.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-14 · updated 2026-08-10

Description

Microsoft Office Security Feature Bypass Vulnerability

Affected products

• Microsoft 365 Apps: all versions
• Microsoft Office: 2013-sp1, 2016, 2019
• Microsoft 365 Apps: from 16.0.1 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
• Microsoft Office 2013 Service Pack 1: from 15.0.0 before 15.0.5363.1000 — fixed in 15.0.5363.1000
• Microsoft Office: from 16.0.0 before 16.0.5188.1000 — fixed in 16.0.5188.1000

How to fix

Upgrade to a fixed version: Microsoft 365 Apps https://aka.ms/OfficeSecurityReleases; Microsoft Office 2013 Service Pack 1 15.0.5363.1000; Microsoft Office 16.0.5188.1000. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34469
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34469

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