Vulnerability · Published Oct 13, 2026 · Assigned by siemens

CVE-2026-85115

Medium 5.5

In plain English

A medium-severity security flaw 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 0.1% (higher than 1% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.1%top 98.8% 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 < V3.3.62). Affected applications do not properly redact PLC restore passwords from HTTP error exception messages. This could allow an attacker with access to logs or other diagnostic output to obtain the plaintext restore password and potentially perform unauthorized operations on the PLC.

Affected products (as reported)

Vendor	Product	Versions
Siemens	.NET Client Library for SIMATIC S7 Webserver API	0 – before V3.3.62

Weakness: CWE-209 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

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