Spoofing Vulnerability in Microsoft Office SharePoint
CVE-2026-56157

5.4MEDIUM

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Enterprise Server 2016
Microsoft Sharepoint Server 2019
Microsoft Sharepoint Server Subscription Edition
Vendor
CVE Published:
14 July 2026

What is CVE-2026-56157?

An improper access control vulnerability in Microsoft Office SharePoint allows an attacker with authorized access to exploit spoofing techniques over a network. This security flaw can lead to unauthorized actions and access to sensitive information, highlighting the need for immediate attention from system administrators and users. To mitigate this risk, it is essential to apply recommended patches and updates provided by Microsoft.

Affected Version(s)

Microsoft SharePoint Enterprise Server 2016 x64-based Systems 16.0.0 < 16.0.5561.1001

Microsoft SharePoint Server 2019 x64-based Systems 16.0.0 < 16.0.10417.20175

Microsoft SharePoint Server Subscription Edition x64-based Systems 16.0.0 < 16.0.19725.20434

References

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

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.