---
id: CVE-2026-85885
title: >-
  Improper neutralization of special elements used in a command ('command
  injection') in M365 Copilot allows an authorized attacker to elevate
  privileges over a network.
summary: >-
  Improper neutralization of special elements used in a command ('command
  injection') in M365 Copilot allows an authorized attacker to elevate
  privileges over a network.
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-77
vendor: microsoft
product: 365_copilot
affected:
  - 365_copilot
published: '2026-09-17'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T20:00:26.797'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85885'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85885'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.00987
epssPercentile: 0.60786
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-18T14:11:14.516592Z'
ingestedAt: '2026-09-17T23:31:20.687Z'
---

## Overview

Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an authorized attacker to elevate privileges over a network.

## Affected

- `365_copilot`

## Remediation

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