# Mitel MiVoice MX-ONE faces RCE flaws

Published: 2026-11-12 · Severity: routine · Sectors: Telecommunications · Not tied to an actor or CVE
Canonical: https://vorant.io/reports/cf928997-ad3d-5ce4-ab48-98103a4558c6/mitel-mivoice-mx-one-faces-rce-flaws
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> CERT-FR warns of multiple vulnerabilities in Mitel MiVoice MX-ONE allowing remote code execution, data exposure, and security bypass; patches available.

Source: cert.cyber.gouv.fr — https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1516

## What to check

- Applies to: Not tied to a specific actor, malware or CVE, only to the sectors it covers, so it may be general reporting. Check the source before acting on it. Whether it concerns you is not assessed.

CERT-FR has published an advisory describing multiple vulnerabilities affecting Mitel MiVoice MX-ONE, a telephony/unified communications platform. The flaws impact versions 8.0.0.33, releases later than 8.2.1.0.14, and versions prior to the fixes delivered in 8.2 SP0 HF5 or 8.2 SP1 HF2. Exploitation of these vulnerabilities could allow an attacker to achieve remote arbitrary code execution, compromise the confidentiality of data, and bypass security policy controls.

No exploitation in the wild is mentioned in the advisory. CERT-FR directs affected organizations to Mitel's own security bulletin (MISA-2026-0011, published 11 November 2026) for detailed patch information and remediation guidance. Organizations running MiVoice MX-ONE within the affected version range should prioritize applying the referenced hotfixes given the potential for remote code execution against what is typically a business-critical communications system.

Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1516

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