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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | .NET Client Library for SIMATIC S7 Webserver API | < V3.3.62 | V3.3.62 |
Advisories 4
- SSA-390352 SSA-390352: Multiple Vulnerabilities in .NET Client Library for SIMATIC S7 Webserver API Siemens ProductCERT · Nov 10, 2026
- ICSA-26-295-10 Siemens SIMATIC S7 Webserver API CISA ICS & IT advisories · Oct 22, 2026
- WID-SEC-2026-3891 Siemens SIMATIC S7: Mehrere Schwachstelle BSI CERT-Bund (WID) · Oct 18, 2026
- NCSC-2026-0415 Kwetsbaarheden verholpen in Siemens-producten NCSC-NL (Netherlands) · Oct 13, 2026