CVE-2026-69804

Analyzed Analyzed - Analysis Complete

Microsoft SharePoint TOCTOU Race Condition Code Execution

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Microsoft Corporation

Description

Time-of-check time-of-use (toctou) race condition 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

2026-09-08

Last Modified

2026-09-09

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-69804

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	sharepoint_server	to 16.0.20326.20090 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-367	The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

Attack-Flow Graph

Executive Summary

This is a time-of-check time-of-use (TOCTOU) race condition in Microsoft Office SharePoint. It allows an authorized attacker to execute arbitrary code remotely over a network by exploiting timing discrepancies between permission checks and actual resource access.

Impact Analysis

An attacker could gain control of your SharePoint server, steal sensitive data, install malware, or disrupt operations. Since it requires authorized access, internal users or compromised accounts pose the highest risk.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Organizations may face fines or legal penalties if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft for SharePoint as soon as possible to address the TOCTOU race condition. Monitor Microsoft's official security advisories for patches and follow their recommended mitigation steps.

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