---
id: CVE-2026-47634
title: Microsoft SharePoint Server Spoofing Vulnerability
summary: >-
  Improper neutralization of special elements in output used by a downstream
  component ('injection') in Microsoft Office SharePoint allows an authorized
  attacker to perform spoofing over a network.
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-74
vendor: Microsoft
product: Microsoft SharePoint Server 2019
affected:
  - sharepoint_server_2019 >= 16.0.0 < 16.0.10417.20153
  - sharepoint_server_subscription_edition >= 16.0.0 < 16.0.19725.20384
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-06-10T13:46:23.417734Z'
published: '2026-06-09'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T13:44:42.571Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-47634'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47634'
    label: Microsoft SharePoint Server Spoofing Vulnerability
tags:
  - cve.org
epss: 0.00559
epssPercentile: 0.45399
ingestedAt: '2026-09-24T14:44:21.386Z'
---

## Overview

Improper neutralization of special elements in output used by a downstream component ('injection') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

## Affected

- `sharepoint_server_2019 >= 16.0.0 < 16.0.10417.20153`
- `sharepoint_server_subscription_edition >= 16.0.0 < 16.0.19725.20384`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.