Path Traversal in Siemens .Net Client Library For Simatic S7 Webserver API
CVE-2026-85114
A vulnerability has been identified in .NET Client Library for SIMATIC S7 Webserver API (All versions < V3.3.61). Affected applications do not properly validate filenames received from remote servers during ticket downloads. This could allow an attacker who can manipulate the ticket response to write arbitrary files outside the intended download directory and, when overwriting is enabled, replace existing files accessible to the application.
Vulnerability class: Path Traversal (Directory Traversal)
Published .
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:N/I:H/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.
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-85114?
- CVE-2026-85114 is a high-severity vulnerability in Siemens .Net Client Library For Simatic S7 Webserver API, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-10-13.
- How severe is CVE-2026-85114?
- High severity. CVSS v3 base score is 7.5 out of 10.