CVE-2026-111855 [HIGH] – An issue was discovered on Tektronix 3 Series MDO devices before 1.21.1. A path traversal

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.