What’s Vulnerable › Vulnerabilities

CVE-2026-111855

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-17 · updated 2026-10-21
• Weakness: CWE-22

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.

Affected products

• Tektronix 3 Series MDO: before 1.21.1 — fixed in 1.21.1

How to fix

Upgrade to a fixed version: Tektronix 3 Series MDO 1.21.1. Check the vendor advisory for mitigations.

References

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

Get alerted when CVE-2026-111855 or the next vulnerability affects your stack