CVE-2026-111854: Tektronix 3 Series Mdo

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue was discovered on Tektronix 3 Series MDO devices before 1.21.1. A path traversal vulnerability in the SCPI FILESystem command interface allows remote attackers to read or modify arbitrary files on the device through insufficient validation of file paths supplied to filesystem access commands.

Affected products

• Tektronix 3 Series Mdo: before 1.21.1 (fixed in 1.21.1)

Published 2026-10-17. Last modified 2026-10-17.