---
id: CVE-2026-58617
title: M365 Copilot for iOS Elevation of Privilege Vulnerability
summary: >-
  Improper access control in Microsoft 365 Copilot for iOS allows an
  unauthorized attacker to elevate privileges over a network.
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-284
vendor: Microsoft
product: Microsoft 365 Copilot for iOS
affected:
  - 365_copilot_for_ios >= 1.0 < 2.111.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-07-14T18:26:55.713971Z'
published: '2026-07-14'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T18:25:22.757Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-58617'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58617'
    label: M365 Copilot for iOS Elevation of Privilege Vulnerability
tags:
  - cve.org
epss: 0.00787
epssPercentile: 0.54222
ingestedAt: '2026-09-08T17:06:31.897Z'
---

## Overview

Improper access control in Microsoft 365 Copilot for iOS allows an unauthorized attacker to elevate privileges over a network.

## Affected

- `365_copilot_for_ios >= 1.0 < 2.111.4`

## Remediation

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