Deserialization Vulnerability in Microsoft Office SharePoint
CVE-2025-47166

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Enterprise Server 2016
Microsoft Sharepoint Server 2019
Microsoft Sharepoint Server Subscription Edition
Vendor
CVE Published:
10 June 2025

What is CVE-2025-47166?

A deserialization vulnerability in Microsoft Office SharePoint allows an authorized attacker to exploit untrusted data, potentially executing arbitrary code over a network. This issue may permit attackers to gain unauthorized access and control over affected systems, leading to significant security risks.

Affected Version(s)

Microsoft SharePoint Enterprise Server 2016 x64-based Systems 16.0.0 < 16.0.5504.1001

Microsoft SharePoint Server 2019 x64-based Systems 16.0.0 < 16.0.10417.20018

Microsoft SharePoint Server Subscription Edition x64-based Systems 16.0.0 < 16.0.18526.20396

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.