Description
Affected products do not properly enforce TCP sequence number validation in specific scenarios but accept values within a broad range. This could allow an unauthenticated remote attacker e.g. to interfere with connection setup, potentially leading to a denial of service. The attack succeeds only if an attacker can inject IP packets with spoofed addresses at precisely timed moments, and it affects only TCP-based services.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | SIDOOR ATD430W | — | — |
| Siemens | SIDOOR ATE530G COATED | — | — |
| Siemens | SIDOOR ATE530S COATED | — | — |
| Siemens | SIMATIC CFU DIQ | < V2.0.0 | V2.0.0 |
| Siemens | SIMATIC CFU PA | < V2.0.0 | V2.0.0 |
| Siemens | SIMATIC ET 200AL IM 157-1 PN | — | — |
| Siemens | SIMATIC ET 200clean, CM 8x IO-Link | — | — |
| Siemens | SIMATIC ET 200clean, DI 16x24VDC | — | — |
| Siemens | SIMATIC ET 200clean, DIQ 16x24VDC/0,5A | — | — |
| Siemens | SIMATIC ET 200eco PN, AI 8xRTD/TC, M12-L | V5.1.1 | — |
| Siemens | SIMATIC ET 200eco PN, CM 4x IO-Link, M12-L | V5.1.1 | — |
| Siemens | SIMATIC ET 200eco PN, CM 8x IO-Link, M12-L | V5.1.1 | — |
| Siemens | SIMATIC ET 200eco PN, DI 16x24VDC, M12-L | V5.1.1 | — |
| Siemens | SIMATIC ET 200eco PN, DI 8x24VDC, M12-L | V5.1.1 | — |
| Siemens | SIMATIC ET 200eco PN, DIQ 16x24VDC/2A, M12-L | V5.1.1 | — |
| Siemens | SIMATIC ET 200eco PN, DQ 8x24VDC/0,5A, M12-L | V5.1.1 | — |
| Siemens | SIMATIC ET 200eco PN, DQ 8x24VDC/2A, M12-L | V5.1.1 | — |
| Siemens | SIMATIC ET 200MP IM 155-5 PN HF | V4.2.0 | — |
| Siemens | SIMATIC ET 200pro IM 154-8 PN/DP CPU | — | — |
| Siemens | SIMATIC ET 200pro IM 154-8F PN/DP CPU | — | — |
| Siemens | SIMATIC ET 200pro IM 154-8FX PN/DP CPU | — | — |
| Siemens | SIMATIC ET 200S IM 151-8 PN/DP CPU | — | — |
| Siemens | SIMATIC ET 200S IM 151-8F PN/DP CPU | — | — |
| Siemens | SIMATIC ET 200SP CPU 1510SP F-1 PN | — | — |
| Siemens | SIMATIC ET 200SP CPU 1510SP-1 PN | — | — |
| Siemens | SIMATIC ET 200SP CPU 1512SP F-1 PN | — | — |
| Siemens | SIMATIC ET 200SP CPU 1512SP-1 PN | — | — |
| Siemens | SIMATIC ET 200SP IM 155-6 MF HF | — | — |
| Siemens | SIMATIC ET 200SP IM 155-6 PN HA (incl. SIPLUS variants) | < V1.3 | V1.3 |
| Siemens | SIMATIC ET 200SP IM 155-6 PN HF | V4.2.0 | — |
| Siemens | SIMATIC ET 200SP IM 155-6 PN/2 HF | V4.2.0 | — |
| Siemens | SIMATIC ET 200SP IM 155-6 PN/3 HF | V4.2.0 | — |
| Siemens | SIMATIC PN/MF Coupler | — | — |
| Siemens | SIMATIC PN/PN Coupler | < V6.0.0 | V6.0.0 |
| Siemens | SIMATIC Power Line Booster PLB, Base Module | — | — |
| Siemens | SIMATIC Power Line Booster PLB, Modem Module ST | — | — |
| Siemens | SIMATIC S7-1200 CPU 1211C AC/DC/Rly | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1211C DC/DC/DC | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1211C DC/DC/Rly | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1212C AC/DC/Rly | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1212C DC/DC/DC | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1212C DC/DC/Rly | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1212FC DC/DC/DC | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1212FC DC/DC/Rly | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1214C AC/DC/Rly | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1214C DC/DC/DC | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1214C DC/DC/Rly | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1214FC DC/DC/DC | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1214FC DC/DC/Rly | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1215C AC/DC/Rly | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1215C DC/DC/DC | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1215C DC/DC/Rly | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1215FC DC/DC/DC | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1215FC DC/DC/Rly | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1200 CPU 1217C DC/DC/DC | < V4.4.0 | V4.4.0 |
| Siemens | SIMATIC S7-1500 CPU 1511-1 PN | — | — |
| Siemens | SIMATIC S7-1500 CPU 1511F-1 PN | — | — |
| Siemens | SIMATIC S7-1500 CPU 1513-1 PN | — | — |
| Siemens | SIMATIC S7-1500 CPU 1513F-1 PN | — | — |
| Siemens | SIMATIC S7-1500 CPU 1515-2 PN | — | — |
| Siemens | SIMATIC S7-1500 CPU 1515F-2 PN | — | — |
| Siemens | SIMATIC S7-1500 CPU 1516-3 PN/DP | — | — |
| Siemens | SIMATIC S7-1500 CPU 1516F-3 PN/DP | — | — |
| Siemens | SIMATIC S7-200 SMART CPU CR40 | — | — |
| Siemens | SIMATIC S7-200 SMART CPU CR60 | — | — |
| Siemens | SIMATIC S7-200 SMART CPU SR20 | — | — |
| Siemens | SIMATIC S7-200 SMART CPU SR30 | — | — |
| Siemens | SIMATIC S7-200 SMART CPU SR40 | — | — |
| Siemens | SIMATIC S7-200 SMART CPU SR60 | — | — |
| Siemens | SIMATIC S7-200 SMART CPU ST20 | — | — |
| Siemens | SIMATIC S7-200 SMART CPU ST30 | — | — |
| Siemens | SIMATIC S7-200 SMART CPU ST40 | — | — |
| Siemens | SIMATIC S7-200 SMART CPU ST60 | — | — |
| Siemens | SIMATIC S7-300 CPU 314C-2 PN/DP | — | — |
| Siemens | SIMATIC S7-300 CPU 315-2 PN/DP | — | — |
| Siemens | SIMATIC S7-300 CPU 315F-2 PN/DP | — | — |
| Siemens | SIMATIC S7-300 CPU 315T-3 PN/DP | — | — |
| Siemens | SIMATIC S7-300 CPU 317-2 PN/DP | — | — |
| Siemens | SIMATIC S7-300 CPU 317F-2 PN/DP | — | — |
| Siemens | SIMATIC S7-300 CPU 317T-3 PN/DP | — | — |
| Siemens | SIMATIC S7-300 CPU 317TF-3 PN/DP | — | — |
| Siemens | SIMATIC S7-300 CPU 319-3 PN/DP | — | — |
| Siemens | SIMATIC S7-300 CPU 319F-3 PN/DP | — | — |
| Siemens | SIMATIC S7-400 CPU 412-2 PN V7 | — | — |
| Siemens | SIMATIC S7-400 CPU 414-3 PN/DP V7 | — | — |
| Siemens | SIMATIC S7-400 CPU 414F-3 PN/DP V7 | — | — |
| Siemens | SIMATIC S7-400 CPU 416-3 PN/DP V7 | — | — |
| Siemens | SIMATIC S7-400 CPU 416F-3 PN/DP V7 | — | — |
| Siemens | SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants) | — | — |
| Siemens | SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants) | < V10.2 | V10.2 |
| Siemens | SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants) | < V8.3 | V8.3 |
| Siemens | SIMATIC TDC CP51M1 | — | — |
| Siemens | SIMATIC TDC CPU555 | — | — |
| Siemens | SIMOCODE pro V Ethernet/IP (incl. SIPLUS variants) | — | — |
| Siemens | SIMOCODE pro V PROFINET | — | — |
| Siemens | SINUMERIK 840D sl | — | — |
| Siemens | SIPLUS ET 200MP IM 155-5 PN HF | V4.2.0 | — |
| Siemens | SIPLUS ET 200MP IM 155-5 PN HF T1 RAIL | V4.2.0 | — |
| Siemens | SIPLUS ET 200S IM 151-8 PN/DP CPU | — | — |
| Siemens | SIPLUS ET 200S IM 151-8F PN/DP CPU | — | — |
Advisories 4
- ICSA-25-352-05 Siemens Interniche IP-Stack CISA ICS & IT advisories · Dec 18, 2025
- WID-SEC-2025-2788 Siemens SIMATIC S7 Produkte: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Dec 9, 2025
- NCSC-2025-0382 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Dec 9, 2025
- SSA-915282 SSA-915282: Denial of service Vulnerability in Interniche IP-Stack based Industrial Devices Siemens ProductCERT · Dec 9, 2025