What’s Vulnerable › Vulnerabilities

CVE-2026-20948: Microsoft Word Remote Code Execution Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-13 · updated 2026-07-30
• Weakness: CWE-822

Description

Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Affected products

• Microsoft 365 Apps: all versions
• Microsoft Office: 2019
• Microsoft Office LTSC for Mac 2021: 2021, 2024
• Microsoft SharePoint Server: 2016, 2019
• Microsoft Word for Android: 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 Office LTSC for Mac 2024: from 16.0.0 before 16.105.26011018 — fixed in 16.105.26011018
• Microsoft Word 2016: from 16.0.1 before 16.0.5535.1000 — fixed in 16.0.5535.1000
• Microsoft Office: from 19.0.0 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
• Microsoft Office LTSC 2024: from 16.0.0 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
• Microsoft Office LTSC for Mac 2021: from 16.0.1 before 16.105.26011018 — fixed in 16.105.26011018
• Microsoft Sharepoint Enterprise Server 2016: from 16.0.0 before 16.0.5535.1001 — fixed in 16.0.5535.1001
• Microsoft SharePoint Server: from 16.0.0 before 16.0.10417.20083 — fixed in 16.0.10417.20083

How to fix

Upgrade to a fixed version: Microsoft 365 Apps https://aka.ms/OfficeSecurityReleases; Microsoft Office LTSC 2021 https://aka.ms/OfficeSecurityReleases; Microsoft Office LTSC for Mac 2024 16.105.26011018; Microsoft Word 2016 16.0.5535.1000; Microsoft Office https://aka.ms/OfficeSecurityReleases; Microsoft Office LTSC 2024 https://aka.ms/OfficeSecurityReleases; Microsoft Office LTSC for Mac 2021 16.105.26011018; Microsoft Sharepoint Enterprise Server 2016 16.0.5535.1001; Microsoft SharePoint Server 16.0.10417.20083. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20948

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