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SSA-390352: Multiple Vulnerabilities in .NET Client Library for SIMATIC S7 Webserver API

HIGH
CVSS 7.5
Date 2026-10-13T00:00:00+00:00
Source siemens-productcert
Published by Siemens ProductCERT

// Description

.NET Client Library for SIMATIC S7 Webserver API contains multiple vulnerabilities that could allow an attacker to obtain sensitive information or write arbitrary files outside the intended download directory. Siemens has released a new version for .NET Client Library for SIMATIC S7 Webserver API and recommends to update to the latest version.

// Vulnerabilities (2)

CVE ID CVSS Score Severity Description
CVE-2026-85114 7.5 high
CVE-2026-85114. 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.
CVE-2026-85115 5.5 medium
CVE-2026-85115. 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 (1)

Vendor Product Asset Type Purdue Level Firmware
Siemens Unknown plc
L1
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// Remediations (1)

Patch: Update to V3.3.62 or later version
Update to V3.3.62 or later version

// References