Microsoft Word Remote Code Execution Vulnerability
This high-severity Microsoft Server advisory covers CVE-2026-20948 affecting Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019.
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Summary
Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Affected products named by the advisory: Microsoft SharePoint Enterprise Server 2016; Microsoft SharePoint Server 2019.
- Microsoft 365 Apps for Enterprise 16.0.1 before https://aka.ms/OfficeSecurityReleases
- Microsoft Office 2019 19.0.0 before https://aka.ms/OfficeSecurityReleases
- Microsoft Office LTSC 2021 16.0.1 before https://aka.ms/OfficeSecurityReleases
- Microsoft Office LTSC 2024 16.0.0 before https://aka.ms/OfficeSecurityReleases
- Microsoft Office LTSC for Mac 2021 16.0.1 before 16.105.26011018
- Microsoft Office LTSC for Mac 2024 16.0.0 before 16.105.26011018
- Microsoft SharePoint Enterprise Server 2016 16.0.0 before 16.0.5535.1001
- Microsoft SharePoint Server 2019 16.0.0 before 16.0.10417.20083
- Microsoft Word 2016 16.0.1 before 16.0.5535.1000
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- https://aka.ms/OfficeSecurityReleases
- 16.105.26011018
- 16.0.5535.1001
- 16.0.10417.20083
- 16.0.5535.1000
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: https://aka.ms/OfficeSecurityReleases, 16.105.26011018, 16.0.5535.1001, 16.0.10417.20083, 16.0.5535.1000. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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