---
id: CVE-2026-45497
title: Microsoft M365 Copilot Remote Code Execution Vulnerability
summary: >-
  Improper neutralization of special elements used in a command ('command
  injection') in Microsoft Copilot allows an authorized attacker to execute code
  over a network.
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-77
vendor: Microsoft
product: Microsoft 365 Copilot
affected:
  - 365_copilot -
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-06-05T00:00:00+00:00'
published: '2026-06-04'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T13:45:16.779Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-45497'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45497'
    label: Microsoft M365 Copilot Remote Code Execution Vulnerability
tags:
  - cve.org
epss: 0.00607
epssPercentile: 0.46741
ingestedAt: '2026-09-24T14:44:21.358Z'
---

## Overview

Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an authorized attacker to execute code over a network.

## Affected

- `365_copilot -`

## Remediation

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