Path Traversal Vulnerability in Microsoft Office SharePoint
CVE-2026-45454

6.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Enterprise Server 2016
Microsoft Sharepoint Server 2019
Microsoft Sharepoint Server Subscription Edition
Vendor
CVE Published:
9 June 2026

What is CVE-2026-45454?

A path traversal vulnerability exists in Microsoft Office SharePoint that allows an authorized attacker to bypass directory restrictions and execute arbitrary code over a network. This flaw results from improper limitations on pathname handling, potentially leading to unauthorized access and exploitation of system resources. Affected users are strongly advised to apply the necessary updates to mitigate this risk.

Affected Version(s)

Microsoft SharePoint Enterprise Server 2016 x64-based Systems 16.0.0 < 16.0.5556.1005

Microsoft SharePoint Server 2019 x64-based Systems 16.0.0 < 16.0.10417.20153

Microsoft SharePoint Server Subscription Edition x64-based Systems 16.0.0 < 16.0.19725.20384

References

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

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.