Improper Authorization Vulnerability in Microsoft Office SharePoint
CVE-2026-58277

8.8HIGH

Key Information:

Vendor

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

What is CVE-2026-58277?

An improper authorization vulnerability exists in Microsoft Office SharePoint that could allow an attacker with authorized access to elevate their privileges over the network. This weakness can be exploited to gain unauthorized access to sensitive resources and functionalities, potentially leading to data compromise and further exploitation within the network environment. Timely application of security updates is essential to mitigate risks associated with this vulnerability.

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

References

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

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

.