---
id: "CVE-2026-88176"
page: "https://infrastack.ai/live/CVE-2026-88176"
kind: "vulnerability"
aliases: ["CVE-2026-88176"]
title: "Microsoft SharePoint: missing authorization lets a logged-in user gain higher privileges"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "SharePoint Server Subscription Edition", "fixed": ["16.0.20326.20190"], "affected": ">= 16.0.0, < 16.0.20326.20190", "ecosystem": "vendor"}]
ecosystems: []
tags: ["microsoft-office", "on-premises", "other", "self-hosted", "sharepoint"]
not_affected_if: ["managed-hosting"]
published_at: "2026-11-10T19:21:26+00:00"
first_seen_at: "2026-11-10T19:25:18+00:00"
updated_at: "2026-11-10T21:07:29+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88176", "first_seen_at": "2026-11-10T19:25:18+00:00"}, {"source": "analyst", "url": "https://cveawg.mitre.org/api/cve/CVE-2026-88176", "first_seen_at": "2026-11-10T21:07:29+00:00", "cites": ["https://cveawg.mitre.org/api/cve/CVE-2026-88176", "https://learn.microsoft.com/en-us/officeupdates/sharepoint-updates"]}]
exploit_sources: []
---

# Microsoft SharePoint: missing authorization lets a logged-in user gain higher privileges

Link for people: https://infrastack.ai/live/CVE-2026-88176 (this .md is for agents)

Microsoft Office SharePoint has a missing authorization check that lets an authorized attacker raise their privileges over the network. The attacker needs a valid account on the SharePoint server first.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:SharePoint Server Subscription Edition affected >= 16.0.0, < 16.0.20326.20190 fixed 16.0.20326.20190

## How to check

In Central Administration > Upgrade and Migration > Check product and patch installation status, or run (Get-SPFarm).BuildVersion in the SharePoint Management Shell. Builds below 16.0.20326.20190 are affected.

## Fix

Install SharePoint Server Subscription Edition build 16.0.20326.20190 (KB 5002927, October 2026 public update) or later.

## Timeline

- 2026-11-10T19:25:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-88176
- 2026-11-10T21:07:29+00:00 analyst https://cveawg.mitre.org/api/cve/CVE-2026-88176 — Microsoft CNA CVE record (cveawg) read: SharePoint Server Subscription Edition 16.0.0 to before 16.0.20326.20190 affected, CWE-862, CVSS 8.8, E:U. MSRC page is JS-only and returned nothing. Build 20190 matches KB 5002927 (Oct 13 2026) on Learn release notes. SharePoint Online and SharePoint 2016/2019 not listed in the record; not confirmed either way. No exploitation or PoC found.

## Documents

- [advisory] CVE-2026-88176 CVE record published by Microsoft (CNA) https://cveawg.mitre.org/api/cve/CVE-2026-88176
- [fix] SharePoint updates - Office release notes https://learn.microsoft.com/en-us/officeupdates/sharepoint-updates

## From the sources

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

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_