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

published 2026-10-05 last mo. modified 2026-10-06 last mo. 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.

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CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: last mo. (2026-10-05)

Exploit prediction

0.10% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-09).

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

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