CVE-2026-88198

Analyzed Analyzed - Analysis Complete

Missing Authorization in Microsoft Office SharePoint

Publication date: 2026-10-13

Last updated on: 2026-10-14

Assigner: Microsoft Corporation

Description

Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

CVSS Scores

EPSS Scores

Probability:
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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-2026-88198

EUVD

EUVD-2026-99737

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-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability is a missing authorization issue in Microsoft Office SharePoint. An authorized attacker can exploit it over a network to elevate their privileges, gaining higher access than intended.

Impact Analysis

An attacker could gain elevated privileges, allowing them to access sensitive data, modify system settings, or perform unauthorized actions within SharePoint. This could lead to data breaches or system compromise.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements such as GDPR (data protection) or HIPAA (health information privacy). Organizations may face legal penalties or reputational damage.

Mitigation Strategies

Apply the latest security updates from Microsoft for SharePoint Server Subscription Edition as soon as possible to address the missing authorization issue.

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