CVE-2026-20959
Unknown Unknown - Not Provided
Cross-Site Scripting in Microsoft SharePoint Enables Network Spoofing

Publication date: 2026-01-13

Last updated on: 2026-01-13

Assigner: Microsoft Corporation

Description
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
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Meta Information
Published
2026-01-13
Last Modified
2026-01-13
Generated
2026-06-16
AI Q&A
2026-01-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-20959
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft office_sharepoint *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability is a cross-site scripting (XSS) issue in Microsoft Office SharePoint where improper neutralization of input during web page generation allows an authorized attacker to perform spoofing over a network. [1]

Impact Analysis

An attacker who is authorized can exploit this vulnerability to perform spoofing attacks over a network, potentially misleading users or systems by presenting false information. [1]

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