Description
A vulnerability has been identified in SIMATIC WinCC Unified PC Runtime V16 (All versions), SIMATIC WinCC Unified PC Runtime V17 (All versions), SIMATIC WinCC Unified PC Runtime V18 (All versions), SIMATIC WinCC Unified PC Runtime V19 (All versions), SIMATIC WinCC Unified PC Runtime V20 (All versions), SIMATIC WinCC Unified PC Runtime V21 (All versions < V21 Update 2). Insufficient protection of key material in WinCC Certificate Manager that could allow an attacker to extract sensitive information.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | SIMATIC WinCC Unified PC Runtime V16 | — | — |
| Siemens | SIMATIC WinCC Unified PC Runtime V17 | — | — |
| Siemens | SIMATIC WinCC Unified PC Runtime V18 | — | — |
| Siemens | SIMATIC WinCC Unified PC Runtime V19 | — | — |
| Siemens | SIMATIC WinCC Unified PC Runtime V20 | — | — |
| Siemens | SIMATIC WinCC Unified PC Runtime V21 | < V21 Update 2 | V21 Update 2 |
Advisories 4
- ICSA-26-174-01 Siemens WinCC Certificate Manager CISA ICS & IT advisories · Jun 23, 2026
- WID-SEC-2026-1826 Siemens TIA Portal (WinCC Unified PC Runtime): Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Jun 9, 2026
- NCSC-2026-0187 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Jun 9, 2026
- SSA-063511 SSA-063511: Insufficient protection of key material in WinCC Certificate Manager Siemens ProductCERT · Jun 9, 2026