CVE-2026-88164

Awaiting Analysis Awaiting Analysis - Queue

Missing Authorization in Microsoft Office SharePoint Elevates Privileges

Publication date: 2026-10-14

Last updated on: 2026-10-16

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:
Percentile:

Meta Information

Published

2026-10-14

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-15

EPSS Evaluated

2026-10-18

NVD

CVE-2026-88164

EUVD

EUVD-2026-101506

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Microsoft	SharePoint Server Subscription Edition 16.0.0

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 to elevate their privileges over a network, potentially gaining unauthorized access to sensitive data or functions.

Impact Analysis

If exploited, this vulnerability could allow an attacker to gain higher-level access in SharePoint, leading to unauthorized data access, modification, or control over SharePoint resources. This may result in data breaches or system compromise.

Compliance Impact

The vulnerability allows unauthorized privilege escalation in Microsoft SharePoint, which could lead to unauthorized access to sensitive data. This may violate compliance requirements under GDPR (data protection) and HIPAA (health information privacy) by exposing personal or health data without proper authorization.

Mitigation Strategies

Apply the latest security updates from Microsoft for SharePoint Server to address the missing authorization issue. Monitor Microsoft's update guide for patches and verify installation on all affected systems.

Hi! I’m here to help you understand CVE-2026-88164. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70