What’s Vulnerable › Vulnerabilities
CVE-2026-65663: Microsoft SharePoint Server Remote Code Execution Vulnerability
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 2.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-11 · updated 2026-10-28
- Weakness: CWE-502
Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Affected products
- Microsoft SharePoint Server: before 16.0.19725.20522; 2016, 2019 — fixed in 16.0.19725.20522
- Microsoft SharePoint Server Subscription Edition: from 16.0.0 before 16.0.19725.20522 — fixed in 16.0.19725.20522
- Microsoft Sharepoint Enterprise Server 2016: from 16.0.0 before 16.0.5565.1001 — fixed in 16.0.5565.1001
- Microsoft SharePoint Server: from 16.0.0 before 16.0.10417.20198 — fixed in 16.0.10417.20198
How to fix
Upgrade to a fixed version: Microsoft SharePoint Server 16.0.19725.20522; Microsoft SharePoint Server Subscription Edition 16.0.19725.20522; Microsoft Sharepoint Enterprise Server 2016 16.0.5565.1001; Microsoft SharePoint Server 16.0.10417.20198. Check the vendor advisory for mitigations.
References
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