---
id: CVE-2026-104810
title: >-
  This vulnerability allows remote attackers to delete sensitive files on
  vulnerable installations of Mitel MiVoice Office 400
summary: >-
  This vulnerability allows remote attackers to delete sensitive files on
  vulnerable installations of Mitel MiVoice Office 400. Authentication is
  required to exploit this vulnerability.





  The specific flaw exists within the web portal li…
severity: high
cvss: 8.4
cvssVector: >-
  CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/AU:Y/U:Amber
cwe:
  - CWE-31
vendor: Mitel
product: Mitel MiVoice Office 400
affected:
  - mivoice_office_400 11.0.96.0
published: '2026-10-05'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T13:16:51.810'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104810'
references:
  - url: 'https://digitalcanion.com/en/security-research/#vendor=mitel&status=cna'
    label: vulnerability@ncsc.ch
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-05T12:45:07.682452Z'
cvssSource: cna
ingestedAt: '2026-10-05T09:16:17.870Z'
epss: 0.00352
epssPercentile: 0.26564
---

## Overview

This vulnerability allows remote attackers to delete sensitive files on vulnerable installations of Mitel MiVoice Office 400. Authentication is required to exploit this vulnerability.




The specific flaw exists within the web portal listening on TCP port 443, under Maintenance → File Management → File Browser, which is affected by a directory traversal vulnerability. By exploiting this vulnerability, an authenticated attacker can access and delete files outside of the intended directory, including files belonging to the Mitel application and the underlying Linux system. Deleting critical system or application files can result in a denial-of-service condition affecting the underlying system.

## Remediation

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