Mitel MiVoice Office 400 Shared Object Hijacking Leading to Arbitrary Code Execution

published 2026-10-05 35 d ago modified 2026-10-06 33 d ago also EUVD-2026-92301

cvss: 8.4; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits: 0; none known

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.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 34 d ago (2026-10-05)

Exploit prediction

0.10% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	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
CNA	4.0	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/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

Affected products

Mitel Mitel MiVoice Office 400

Classification

Weakness

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

References

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

Sources

CVE List CVE-2026-104809
NVD CVE-2026-104809

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary