Description
The OPC UA implementations (ANSI C and C++) in affected products contain an integer overflow vulnerability that could cause the application to run into an infinite loop during certificate validation.
This could allow an unauthenticated remote attacker to create a denial of service condition by sending a specially crafted certificate.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | SIMATIC BRAUMAT | < V8.1 SP1 | V8.1 SP1 |
| Siemens | SIMATIC Cloud Connect 7 CC712 | < V2.2 | V2.2 |
| Siemens | SIMATIC Cloud Connect 7 CC716 | < V2.2 | V2.2 |
| Siemens | SIMATIC Comfort/Mobile RT | — | — |
| Siemens | SIMATIC Drive Controller CPU 1504D TF | < V2.9.7, V3.0.1 – < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC Drive Controller CPU 1507D TF | < V2.9.7, V3.0.1 – < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC ET 200SP CPU 1510SP F-1 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC ET 200SP CPU 1510SP-1 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC ET 200SP CPU 1512SP F-1 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC ET 200SP CPU 1512SP-1 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC ET 200SP CPU 1514SP F-2 PN | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC ET 200SP CPU 1514SP-2 PN | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC ET 200SP CPU 1514SPT F-2 PN | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC ET 200SP CPU 1514SPT-2 PN | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) | < V21.9.7, V30.0.0 – < V30.1.0 | V21.9.7 |
| Siemens | SIMATIC IPC DiagMonitor | — | — |
| Siemens | SIMATIC NET PC Software V14 | — | — |
| Siemens | SIMATIC NET PC Software V16 | < V16 Update 8 | V16 Update 8 |
| Siemens | SIMATIC NET PC Software V17 | < V17 SP1 Update 1 | V17 SP1 Update 1 |
| Siemens | SIMATIC NET PC Software V18 | < V18 Update 1 | V18 Update 1 |
| Siemens | SIMATIC PCS 7 V9.1 | < V9.1 SP2 UC08 | V9.1 SP2 UC08 |
| Siemens | SIMATIC PCS neo V4.0 | — | — |
| Siemens | SIMATIC S7-1500 CPU 1511-1 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1511C-1 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1511F-1 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1511T-1 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1511TF-1 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1512C-1 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1513-1 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1513F-1 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1515-2 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1515F-2 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1515T-2 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1515TF-2 PN | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1516-3 PN/DP | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1516F-3 PN/DP | < V2.9.7, < V3.0.3 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU 1516T-3 PN/DP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU 1516TF-3 PN/DP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU 1517-3 PN/DP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU 1517F-3 PN/DP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU 1517T-3 PN/DP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU 1517TF-3 PN/DP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU 1518T-4 PN/DP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU 1518TF-4 PN/DP | < V3.0.3 | V3.0.3 |
| Siemens | SIMATIC S7-1500 CPU S7-1518-4 PN/DP ODK | < V2.9.7 | V2.9.7 |
| Siemens | SIMATIC S7-1500 CPU S7-1518F-4 PN/DP ODK | < V2.9.7 | V2.9.7 |
| Siemens | SIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIMATIC S7-1500 Software Controller V2 | < V21.9.7 | V21.9.7 |
| Siemens | SIMATIC S7-1500 Software Controller V3 | < V30.1.0 | V30.1.0 |
| Siemens | SIMATIC S7-PLCSIM Advanced | < V5.0 Update 2 | V5.0 Update 2 |
| Siemens | SIMATIC SISTAR | < V8.1 SP1 | V8.1 SP1 |
| Siemens | SIMATIC WinCC OA V3.17 | < V3.17 P029 | V3.17 P029 |
| Siemens | SIMATIC WinCC OA V3.18 | < V3.18 P019 | V3.18 P019 |
| Siemens | SIMATIC WinCC OA V3.19 | < V3.19 P005 | V3.19 P005 |
| Siemens | SIMATIC WinCC OPC UA Client | < V2.0.0.1 | V2.0.0.1 |
| Siemens | SIMATIC WinCC Runtime Professional V16 | — | — |
| Siemens | SIMATIC WinCC Runtime Professional V17 | — | — |
| Siemens | SIMATIC WinCC Runtime Professional V18 | — | — |
| Siemens | SIMATIC WinCC Runtime Professional V19 | < V19 Update 2 | V19 Update 2 |
| Siemens | SIMATIC WinCC Unified OPC UA Server | < V5.0.0.0 | V5.0.0.0 |
| Siemens | SIMATIC WinCC V7.4 | — | — |
| Siemens | SIMATIC WinCC V7.5 | < V7.5 SP2 Update 20 | V7.5 SP2 Update 20 |
| Siemens | SIMATIC WinCC V8.0 | < V8.0 Update 5 | V8.0 Update 5 |
| Siemens | SINUMERIK MC | < V1.22 | V1.22 |
| Siemens | SINUMERIK ONE | < V6.22 | V6.22 |
| Siemens | SIPLUS ET 200SP CPU 1510SP F-1 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS ET 200SP CPU 1510SP F-1 PN RAIL | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS ET 200SP CPU 1510SP-1 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS ET 200SP CPU 1510SP-1 PN RAIL | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS ET 200SP CPU 1512SP F-1 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS ET 200SP CPU 1512SP-1 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS ET 200SP CPU 1512SP-1 PN RAIL | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1511-1 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1511-1 PN TX RAIL | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1511F-1 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1513-1 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1513F-1 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1515F-2 PN | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1515F-2 PN RAIL | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1515F-2 PN T2 RAIL | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1516-3 PN/DP | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1516-3 PN/DP RAIL | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1516-3 PN/DP TX RAIL | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1516F-3 PN/DP | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL | < V2.9.7 | V2.9.7 |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP | < V3.0.3 | V3.0.3 |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | < V3.0.3 | V3.0.3 |
| Siemens | SIPLUS S7-1500 CPU 1518F-4 PN/DP | < V3.0.3 | V3.0.3 |
Advisories 5
- ICSA-23-257-01 Siemens SIMATIC, SIPLUS Products CISA ICS & IT advisories · Nov 11, 2025
- SSA-711309 SSA-711309: Denial of Service Vulnerability in the OPC UA Implementations of SIMATIC Products Siemens ProductCERT · Nov 11, 2025
- WID-SEC-2023-2315 Siemens SIMATIC S7: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Dec 13, 2023
- ICSA-23-348-06 Siemens OPC UA Implementation in SINUMERIK ONE and SINUMERIK MC CISA ICS & IT advisories · Dec 12, 2023
- SSA-118850 SSA-118850: Denial of Service Vulnerability in the OPC UA Implementation in SINUMERIK ONE and SINUMERIK MC Siemens ProductCERT · Dec 12, 2023