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.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
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.
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.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-104809 being exploited?
There is no known exploitation of CVE-2026-104809 in the wild and no public exploit code.
Sources
Also known as GHSA-vr7j-w64f-pgvw.