# CVE-2026-104809: Mitel MiVoice Office 400 Shared Object Hijacking Leading to Arbitrary Code Execution

> Attackers can execute arbitrary code with elevated privileges by hijacking shared object loading in Mitel MiVoice Office 400.

- **Severity:** High 8.4 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Oct 2026
- **Updated:** 5 Oct 2026
- **Also known as:** GHSA-vr7j-w64f-pgvw

## What is CVE-2026-104809?

CVE-2026-104809 is a high-severity code injection vulnerability in Mitel MiVoice Office 400, published on 5 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

DigitalCanion has discovered a vulnerability that allows an attacker to cause the system to load an attacker-controlled .so file instead of the expected legitimate module. The loading mechanism relies on a predictable module name without adequately verifying the file’s origin or integrity. A malicious shared object using the expected name can therefore be loaded by a privileged process. The module code then executes within the context and privileges of that process. This results in arbitrary code execution and full compromise of the Mitel Linux virtual machine.

Weakness: CWE-829 (Inclusion of Functionality from Untrusted Control Sphere), CWE-73 (External Control of File Name or Path), CWE-494 (Download of Code Without Integrity Check), CWE-427 (Uncontrolled Search Path Element), CWE-426 (Untrusted Search Path)

## Which versions are affected by CVE-2026-104809?


## How do I fix CVE-2026-104809?

No fix has been published for CVE-2026-104809 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-104809 being exploited?

There is no known exploitation of CVE-2026-104809 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-104809 and fix it if it is affected.

What it is: CVE-2026-104809 is a high-severity code injection vulnerability in Mitel MiVoice Office 400, published on 5 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-104809 in the wild and no public exploit code.

Affected product: Mitel MiVoice Office 400. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-104809/ (Markdown: https://insights.sbomify.com/CVE-2026-104809/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-104809
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104809
- OSV: https://osv.dev/vulnerability/CVE-2026-104809

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-104809/
Summaries are generated and may contain mistakes; the official description above is the record.