CVE-2026-104805: CWE-22 — Path Traversal in Mitel Mitel MiVoice Office 400
Description
DigitalCanion has discovered a vulnerability in the backup restoration functionality that allows an attacker with access to the configured backup repository to introduce arbitrary files into the system during restoration. The specific flaw exists within the backup restoration mechanism, which fails to properly validate the paths, file types, integrity, and authenticity of files contained within a restored TGZ archive. The application does not perform file-signature verification before extracting the archive, allowing a specially crafted backup to contain attacker-controlled files. An attacker with access to the backup SFTP or other configured repository can therefore provide a malicious TGZ archive that, when restored by the system, may place arbitrary files on the underlying Linux system. Depending on the location and permissions of the extracted files, this behavior can potentially be leveraged to achieve arbitrary code execution with root privileges and compromise the underlying virtual machine. The absence of enforced backup passwords further reduces the protection provided by the backup mechanism and may facilitate unauthorized access to the repository.
CVSS v4.0
Score 8.5high
Affected software
Mitel
Mitel MiVoice Office 400
pkg:github/mitel/mitel-mivoice-office-400Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability exists in the backup restoration mechanism of Mitel MiVoice Office 400 (version 11.0.96.0), where the system fails to validate file paths, types, integrity, and authenticity within restored TGZ archives. No file-signature verification is performed before extraction, allowing an attacker with access to the backup SFTP or repository to provide a crafted archive containing arbitrary files. When restored, these files may be placed anywhere on the Linux host, potentially enabling arbitrary code execution with root privileges and full system compromise. The absence of enforced backup passwords further reduces protection against unauthorized access to the backup repository.
Potential Impact
An attacker with access to the configured backup repository can introduce arbitrary files into the system during backup restoration. This can lead to arbitrary code execution with root privileges on the underlying Linux virtual machine, resulting in complete system compromise. The lack of enforced backup passwords increases the likelihood of unauthorized repository access, exacerbating the risk.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the backup repository to trusted users only and enforce strong access controls. Monitor backup restoration processes carefully and avoid restoring backups from untrusted sources.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- NCSC.ch
- Date Reserved
- 2026-10-02T13:47:44.296Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac368022cdf04f656e4400f
Added to database: 10/05/2026, 09:04:02 UTC
Last enriched: 10/05/2026, 09:18:21 UTC
Last updated: 10/05/2026, 18:56:34 UTC
Views: 18
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