CVE-2026-85115: Siemens Net Client Library For SIMATIC s7 Webserver API

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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

• Siemens Net Client Library For SIMATIC s7 Webserver API: before V3.3.62 (fixed in V3.3.62)

Published 2026-10-13. Last modified 2026-10-15.