CVE-2026-45484
Undergoing Analysis Undergoing Analysis - In Progress
Deserialization Flaw in Microsoft Office SharePoint Elevates Privileges

Publication date: 2026-06-09

Last updated on: 2026-06-09

Assigner: Microsoft Corporation

Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
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Meta Information
Published
2026-06-09
Last Modified
2026-06-09
Generated
2026-06-10
AI Q&A
2026-06-09
EPSS Evaluated
N/A
NVD
CVE-2026-45484
EUVD
EUVD-2026-35581
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft office_sharepoint *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
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Executive Summary

This vulnerability involves the deserialization of untrusted data in Microsoft Office SharePoint. It allows an authorized attacker to elevate their privileges over a network by exploiting how SharePoint processes serialized data.

Impact Analysis

The impact of this vulnerability is an elevation of privilege, meaning an attacker who already has some level of access can gain higher-level permissions. This can lead to full control over the affected system, potentially compromising confidentiality, integrity, and availability of data.

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