High · CVSS 8.4CVE-2026-104809

Mitel MiVoice Office 400 Shared Object Hijacking Leading to Arbitrary Code ExecutionCVE-2026-104809

Answer in brief

CVE-2026-104809 records a High severity (CVSS 8.4) vulnerability in Mitel MiVoice Office 400 Shared Object Hijacking Leading to Arbitrary Code Execution. The current sources do not mark it as known exploited. The current feed maps Mitel/Mitel MiVoice Office 400 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 5, 2026Updated Oct 5, 2026Source checked Oct 5, 2026First seen by HOL Oct 5, 2026Material review Oct 5, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.4
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Mitel/Mitel MiVoice Office 400 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Mitel/Mitel MiVoice Office 400generic	11.0.96.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Mitel/Mitel MiVoice Office 400.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Oct 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 5, 2026

Sources and claim methodology

Source referencedigitalcanion.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.