CVE-2026-65663: Microsoft SharePoint Server Remote Code Execution Vulnerability
This Microsoft advisory covers CVE-2026-65663 in Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019 and Microsoft SharePoint Server Subscription Edition.
- CVE-2026-65663
Key facts
- Vendor rating
- High, CVSS 8.8
- CISA KEV
- Not listed (catalogue checked )
- Affected
- Microsoft SharePoint Enterprise Server 2016 16.0.0 before 16.0.5565.1001; Microsoft SharePoint Server 2019 16.0.0 before 16.0.10417.20198; Microsoft SharePoint Server Subscription Edition 16.0.0 before 16.0.19725.20522
- Fixed in
- KB5002905 (build 16.0.5565.1001), KB5002906 (build 16.0.5565.1001), KB5002894 (build 16.0.10417.20198) and 2 more below
- Source published
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
Microsoft SharePoint Server Remote Code Execution Vulnerability
Affected products named by the advisory: Microsoft SharePoint Enterprise Server 2016; Microsoft SharePoint Server 2019; Microsoft SharePoint Server Subscription Edition.
Text from the source record.
- Microsoft SharePoint Enterprise Server 2016 16.0.0 before 16.0.5565.1001
- Microsoft SharePoint Server 2019 16.0.0 before 16.0.10417.20198
- Microsoft SharePoint Server Subscription Edition 16.0.0 before 16.0.19725.20522
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-65663
Upgrade to a fixed release named by Microsoft:
- KB5002905 (build 16.0.5565.1001)
- KB5002906 (build 16.0.5565.1001)
- KB5002894 (build 16.0.10417.20198)
- KB5002896 (build 16.0.10417.20198)
- KB5002893 (build 16.0.19725.20522)
Vendor guidance
- Install the applicable security update for your platform: KB5002905, KB5002906, KB5002894, KB5002896, KB5002893 (see the Microsoft Update Catalog).
End-of-life dates for Microsoft SharePoint Server
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Microsoft Server advisories, August 2026All Microsoft Server advisories
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