{"id":"CVE-2026-111855","title":"An issue was discovered on Tektronix 3 Series MDO devices before 1.21.1","summary":"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 …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cvssSource":"cna","cwe":["CWE-22"],"vendor":"Tektronix","product":"3 Series MDO","affected":["3_series_mdo < 1.21.1"],"published":"2026-10-17","updated":"2026-10-17","sourceUpdated":"2026-10-17T02:09:21.352Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111855","references":[{"url":"https://www.tek.com/en/products/oscilloscopes/3-series-mdo"},{"url":"https://download.tek.com/document/TEK-PSA-002-092026.pdf"}],"tags":["cve.org"],"ingestedAt":"2026-10-17T02:57:58.446Z","slug":"CVE-2026-111855","body":"## Overview\n\nAn 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.\n\n## Affected\n\n- `3_series_mdo < 1.21.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}