CVE-2026-111855
Received Received - Intake

Path Traversal in Tektronix 3 Series MDO Web Interface

Publication date: 2026-10-17

Last updated on: 2026-10-17

Assigner: MITRE

Description
An issue was discovered on Tektronix 3 Series MDO devices before 1.21.1. A path traversal vulnerability exists in the web management interface of the device. Insufficient validation of user-supplied file paths allows remote attackers to read arbitrary files accessible to the application. Depending on configuration, exploitation may be possible without authentication.

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Meta Information

Published
2026-10-17
Last Modified
2026-10-17
Generated
2026-10-17
AI Q&A
2026-10-17
EPSS Evaluated
N/A
NVD
CVE-2026-111855
EUVD
EUVD-2026-103208

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Tektronix 3 Series MDO 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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Executive Summary

This is a path traversal vulnerability in the web management interface of Tektronix 3 Series MDO devices running firmware before version 1.21.1. It allows remote attackers to read arbitrary files on the device by exploiting insufficient validation of user-supplied file paths. Exploitation may be possible without authentication depending on the device configuration.

Detection Guidance

To detect this vulnerability, check the firmware version of your Tektronix 3 Series MDO device. If it is below 1.21.1, the device is vulnerable. Use the web interface or CLI to verify the version. No specific commands are provided in the context.

Impact Analysis

An attacker could exploit this to access sensitive files on the device, potentially exposing confidential data, configuration details, or system files. This could lead to unauthorized information disclosure, device misconfiguration, or further attacks if credentials or keys are exposed.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR or HIPAA by allowing unauthorized access to personal or health data stored on the device. Organizations may face legal penalties, data breach notifications, and reputational damage if such data is exposed due to insufficient file access controls.

Mitigation Strategies

Immediately update Tektronix 3 Series MDO devices to firmware version 1.21.1 or later to address the path traversal vulnerability in the web management interface.

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