---
id: CVE-2026-88156
title: >-
  Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized
  attacker to execute code over a network.
summary: >-
  Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized
  attacker to execute code over a network.
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-121
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T21:19:51.363'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88156'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88156'
    label: secure@microsoft.com
tags:
  - nvd
ingestedAt: '2026-10-13T19:43:29.227Z'
---

## Overview

Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.

## Remediation

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