Path Traversal Vulnerability in Tektronix 3 Series MDO Devices
CVE-2026-111855

7.5HIGH

Key Information:

Vendor

Tektronix

Status
3 Series Mdo
Vendor
CVE Published:
17 October 2026

What is CVE-2026-111855?

A path traversal vulnerability has been identified in the web management interface of Tektronix 3 Series MDO devices prior to version 1.21.1. This issue arises from insufficient validation of user-supplied file paths, enabling remote attackers to potentially access arbitrary files within the application. In certain configurations, it may be possible to exploit this vulnerability without requiring authentication, posing serious security risks to users.

Affected Version(s)

3 Series MDO 0 < 1.21.1

References

https://www.tek.com/en/products/oscilloscopes/3-series-mdo
https://download.tek.com/document/TEK-PSA-002-092026.pdf

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.