Main Vulnerability Database Vulnerabilities #VU134165

Path traversal in Microsoft products - CVE-2026-45454

Published: June 10, 2026

Vulnerability identifier: #VU134165

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-45454

CWE-ID: CWE-22

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in Microsoft SharePoint. A remote user can send a specially crafted HTTP request and read arbitrary files on the system.

Affected software

Microsoft SharePoint Enterprise Server
Microsoft SharePoint Server
Microsoft SharePoint Server Subscription Edition

How to mitigate CVE-2026-45454

Install updates from vendor's website.

Microsoft SharePoint Enterprise Server - update to 16.0.5556.1005
Microsoft SharePoint Server - update to 16.0.10417.20153
Microsoft SharePoint Server Subscription Edition - update to 16.0.19725.20384

External References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45454

Related Security Bulletins