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CVE-2025-47166: Microsoft SharePoint Server Remote Code Execution Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 21.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-06-10 · updated 2026-06-17
• 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: 2016
• Microsoft SharePoint Server: before 16.0.18526.20396; 2019 — fixed in 16.0.18526.20396
• Microsoft SharePoint Server Subscription Edition: from 16.0.0 before 16.0.18526.20396 — fixed in 16.0.18526.20396
• Microsoft Sharepoint Enterprise Server 2016: from 16.0.0 before 16.0.5504.1001 — fixed in 16.0.5504.1001
• Microsoft SharePoint Server: from 16.0.0 before 16.0.10417.20018 — fixed in 16.0.10417.20018

How to fix

Upgrade to a fixed version: Microsoft SharePoint Server 16.0.18526.20396; Microsoft SharePoint Server Subscription Edition 16.0.18526.20396; Microsoft Sharepoint Enterprise Server 2016 16.0.5504.1001; Microsoft SharePoint Server 16.0.10417.20018. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47166

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