---
id: CVE-2026-96185
title: Microsoft Exchange Online Remote Code Execution Vulnerability
summary: >-
  Stack-based buffer overflow in Microsoft Exchange Online allows an authorized
  attacker to execute code over a network.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-121
vendor: Microsoft
product: Microsoft Exchange Online
affected:
  - exchange_online -
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-22T23:04:23.441506Z'
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T23:04:30.705Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-96185'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96185'
    label: Microsoft Exchange Online Remote Code Execution Vulnerability
tags:
  - cve.org
ingestedAt: '2026-10-22T22:00:50.453Z'
---

## Overview

Stack-based buffer overflow in Microsoft Exchange Online allows an authorized attacker to execute code over a network.

## Affected

- `exchange_online -`

## Remediation

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