CVE-2026-45454
Analyzed Analyzed - Analysis Complete

Path Traversal in Microsoft Office SharePoint

Vulnerability report for CVE-2026-45454, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-06-09

Last updated on: 2026-06-10

Assigner: Microsoft Corporation

Description

Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-06-09
Last Modified
2026-06-10
Generated
2026-06-30
AI Q&A
2026-06-09
EPSS Evaluated
2026-06-28
NVD
EUVD

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
microsoft sharepoint_server 2019
microsoft sharepoint_server 2016
microsoft sharepoint_server to 16.0.19725.20384 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

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Executive Summary

This vulnerability is an improper limitation of a pathname to a restricted directory, also known as a 'path traversal' vulnerability, in Microsoft Office SharePoint.

It allows an authorized attacker to execute code over a network by exploiting the way SharePoint handles file paths.

Impact Analysis

The vulnerability can lead to remote code execution, meaning an attacker with authorized access can run malicious code on the affected system over the network.

This can compromise the confidentiality of data (as indicated by the CVSS score impact on confidentiality), potentially leading to unauthorized data access or manipulation.

Compliance Impact

The vulnerability allows an authorized attacker to execute code remotely on Microsoft Office SharePoint due to improper limitation of a pathname to a restricted directory (path traversal).

Such a remote code execution vulnerability could potentially lead to unauthorized access or manipulation of sensitive data stored within SharePoint environments.

This risk may impact compliance with data protection standards and regulations like GDPR and HIPAA, which require safeguarding sensitive information against unauthorized access and ensuring system integrity.

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EPSS Chart