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CVE-2023-29335: Microsoft Word Security Feature Bypass Vulnerability

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-05-09 · updated 2026-06-17
• Weakness: CWE-20

Description

Microsoft Word Security Feature Bypass Vulnerability

Affected products

• Microsoft 365 Apps: all versions
• Microsoft Office: 2019
• Microsoft Office LTSC for Mac 2021: 2021
• Microsoft Windows 10 Version 1507: before 10.0.10240.19926 — fixed in 10.0.10240.19926
• Microsoft Windows 10 1607: before 10.0.14393.5921 — fixed in 10.0.14393.5921
• Microsoft Windows 10: before 10.0.17763.4377 — fixed in 10.0.17763.4377
• Microsoft Windows 10 20H2: before 10.0.19042.2965 — fixed in 10.0.19042.2965
• Microsoft Windows 10: before 10.0.19044.2965 — fixed in 10.0.19044.2965
• Microsoft Windows 10: before 10.0.19045.2965 — fixed in 10.0.19045.2965
• Microsoft Windows 11 21H2: before 10.0.22000.1936 — fixed in 10.0.22000.1936
• Microsoft Windows 11: before 10.0.22000.1702 — fixed in 10.0.22000.1702
• Microsoft Windows Server 2008: r2-sp1
• Microsoft Windows Server 2012: r2
• Microsoft Windows Server 2016: all versions
• Microsoft Windows Server 2022: all versions
• Microsoft Word for Android: 2013, 2013-sp1, 2016
• Microsoft 365 Apps: from 16.0.1 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
• Microsoft Office LTSC 2021: from 16.0.1 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
• Microsoft Word 2013 Service Pack 1: from 15.0.1 before 15.0.5553.1000 — fixed in 15.0.5553.1000
• Microsoft Word 2016: from 16.0.1 before 16.0.5395.1000 — fixed in 16.0.5395.1000
• Microsoft Office: from 19.0.0 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 10.0.10240.19926; Microsoft Windows 10 1607 10.0.14393.5921; Microsoft Windows 10 10.0.17763.4377; Microsoft Windows 10 20H2 10.0.19042.2965; Microsoft Windows 10 10.0.19044.2965; Microsoft Windows 10 10.0.19045.2965; Microsoft Windows 11 21H2 10.0.22000.1936; Microsoft Windows 11 10.0.22000.1702; Microsoft 365 Apps https://aka.ms/OfficeSecurityReleases; Microsoft Office LTSC 2021 https://aka.ms/OfficeSecurityReleases; Microsoft Word 2013 Service Pack 1 15.0.5553.1000; Microsoft Word 2016 16.0.5395.1000. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29335
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29335

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