Deserialization Flaw in Microsoft Office SharePoint Permits Remote Code Execution

Publication date: 2026-06-01

Last updated on: 2026-06-03

Assigner: Microsoft Corporation

Description

Deserialization of untrusted data 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

2026-06-01

Last Modified

2026-06-03

Generated

2026-07-12

AI Q&A

2026-06-01

EPSS Evaluated

2026-07-10

NVD

CVE-2026-47294

EUVD

EUVD-2026-33745

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	sharepoint_server	2019
microsoft	sharepoint_server	2016
microsoft	sharepoint_server	to 16.0.19725.20280 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-78	The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability involves the deserialization of untrusted data in Microsoft Office SharePoint. It allows an authorized attacker to execute code remotely over a network by exploiting the way SharePoint processes serialized data.

Impact Analysis

The vulnerability can lead to remote code execution, meaning an attacker with authorization could run arbitrary code on the affected system over the network. This can result in full compromise of confidentiality, integrity, and availability of the system.

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