---
title: "CVE-2026-104810: Mitel MiVoice Office 400 - Path Traversal"
description: "Mitel MiVoice Office 400 contains a path traversal vulnerability in the web portal's File Browser under Maintenance → File Management, letting authenticated attackers delete sensitive files outside intended directories, causing denial of service."
url: https://panop.io/threat-heartbeat/CVE-2026-104810/
---

# CVE-2026-104810 Mitel MiVoice Office 400 - Path Traversal

Mitel MiVoice Office 400 contains a path traversal vulnerability in the web portal's File Browser under Maintenance → File Management, letting authenticated attackers delete sensitive files outside intended directories, causing denial of service.

CVSS base score 8.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.35% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-104810)

## Details

Type

Path Traversal

Impact

Denial Of Service, File System Write

CVSS vector

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:Amber

Published

5 October 2026

Updated

15 October 2026

Weakness

[CWE-31](https://cwe.mitre.org/data/definitions/31.html)

## Vendor fix

Update to the latest Mitel MiVoice Office 400 version with the vulnerability fixed.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-104810](https://nvd.nist.gov/vuln/detail/CVE-2026-104810)
- [https://digitalcanion.com/en/security-research/#vendor=mitel&status=cna](https://digitalcanion.com/en/security-research/#vendor=mitel&status=cna)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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