CVE-2026-63520
Received Received - Intake

Improper Input Validation in Microsoft Office SharePoint

Publication date: 2026-08-11

Last updated on: 2026-08-11

Assigner: Microsoft Corporation

Description
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

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Meta Information

Published
2026-08-11
Last Modified
2026-08-11
Generated
2026-08-11
AI Q&A
2026-08-11
EPSS Evaluated
N/A
NVD
CVE-2026-63520
EUVD
EUVD-2026-56298

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft office_sharepoint *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

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Executive Summary

This vulnerability is an improper input validation flaw in Microsoft Office SharePoint. It allows an unauthorized attacker to execute arbitrary code remotely over a network without needing user interaction.

Impact Analysis

An attacker could exploit this to run malicious code on affected SharePoint servers, potentially leading to data breaches, unauthorized access, or system compromise. This could disrupt services or steal sensitive information.

Compliance Impact

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

Mitigation Strategies

Apply the latest security updates from Microsoft for SharePoint as soon as possible to address the improper input validation flaw.

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