---
id: CVE-2026-88163
title: >-
  Integer overflow or wraparound in Microsoft Office SharePoint allows an
  authorized attacker to execute code over a network.
summary: >-
  Integer overflow or wraparound in Microsoft Office SharePoint allows an
  authorized attacker to execute code 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-122
  - CWE-190
vendor: microsoft
product: sharepoint_server
affected:
  - sharepoint_server < 16.0.20326.20190
patched:
  - sharepoint_server 16.0.20326.20190
published: '2026-10-13'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T19:44:41.720'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88163'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88163'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.00819
epssPercentile: 0.56238
ingestedAt: '2026-10-13T19:43:29.229Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-13T19:53:09.202374Z'
---

## Overview

Integer overflow or wraparound in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

## Affected

- `sharepoint_server < 16.0.20326.20190`

## Remediation

Upgrade past the affected range:

- `sharepoint_server 16.0.20326.20190`