Vulnerability · Published Oct 13, 2026 · Assigned by siemens

CVE-2026-85114

High 7.5

In plain English

A high-severity path traversal in .NET Client Library for SIMATIC S7 Webserver API from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.3%top 73.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Siemens	.NET Client Library for SIMATIC S7 Webserver API	0 – before V3.3.61

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

https://cert-portal.siemens.com/productcert/html/ssa-390352.html