What is CVE-2026-111855?

CVE-2026-111855 is a high-severity vulnerability, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-10-17.

How severe is CVE-2026-111855?

High severity. CVSS v3 base score is 7.5 out of 10.

CVE-2026-111855

CVE-2026-111855

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.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2026-10-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Weakness classification (CWE)

CWE-22 — Path Traversal

References

Frequently asked questions

What is CVE-2026-111855?: CVE-2026-111855 is a high-severity vulnerability, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-10-17.
How severe is CVE-2026-111855?: High severity. CVSS v3 base score is 7.5 out of 10.