---
id: CVE-2026-88164
title: >-
  Missing authorization in Microsoft Office SharePoint allows an authorized
  attacker to elevate privileges over a network.
summary: >-
  Missing authorization in Microsoft Office SharePoint allows an authorized
  attacker to elevate privileges over a network.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-862
vendor: Microsoft
product: Microsoft SharePoint Server Subscription Edition
affected:
  - sharepoint_server_subscription_edition >= 16.0.0 < 16.0.20326.20190
published: '2026-10-14'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T11:17:52.763'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88164'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88164'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T03:57:18.320113Z'
ingestedAt: '2026-10-14T18:47:39.320Z'
epss: 0.00839
epssPercentile: 0.57619
---

## Overview

Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

## Remediation

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