CVE-2026-102864

Analyzed Analyzed - Analysis Complete

Cross-Site Scripting in Microsoft Office SharePoint

Publication date: 2026-10-13

Last updated on: 2026-10-14

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-13

Last Modified

2026-10-14

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-102864

EUVD

EUVD-2026-99047

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	sharepoint_server	to 16.0.20326.20190 (exc)

Helpful Resources

Exploitability

CWE

KEV

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.

Attack-Flow Graph

Executive Summary

This vulnerability is a cross-site scripting (XSS) flaw in Microsoft Office SharePoint. It occurs when user input is not properly neutralized during web page generation, allowing an attacker to inject malicious scripts. This can lead to spoofing attacks where the attacker impersonates legitimate users or content.

Impact Analysis

An authorized attacker could exploit this to perform spoofing attacks over a network. This may allow them to trick users into revealing sensitive information, perform unauthorized actions, or gain access to restricted content within SharePoint.

Mitigation Strategies

Apply the latest security updates from Microsoft for SharePoint Server to address the cross-site scripting vulnerability. Monitor Microsoft's official security advisories for patches and follow their recommended mitigation steps.

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