CVE-2025-40820 (GCVE-0-2025-40820)
Vulnerability from cvelistv5
Published
2025-12-09 10:44
Modified
2025-12-09 15:55
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-940 - Improper Verification of Source of a Communication Channel
Summary
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.
References
Impacted products
Vendor Product Version
Siemens SIDOOR ATD430W Version: 0   < *
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   Siemens SIDOOR ATE530G COATED Version: 0   < *
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   Siemens SIDOOR ATE530S COATED Version: 0   < *
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   Siemens SIMATIC CFU DIQ Version: 0   < V2.0.0
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   Siemens SIMATIC CFU PA Version: 0   < V2.0.0
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   Siemens SIMATIC CFU PA Version: 0   < V2.0.0
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   Siemens SIMATIC ET 200AL IM 157-1 PN Version: 0   < *
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   Siemens SIMATIC ET 200clean, CM 8x IO-Link Version: 0   < *
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   Siemens SIMATIC ET 200clean, DI 16x24VDC Version: 0   < *
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   Siemens SIMATIC ET 200clean, DIQ 16x24VDC/0,5A Version: 0   < *
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   Siemens SIMATIC ET 200eco PN, AI 8xRTD/TC, M12-L Version: V5.1.1   < *
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   Siemens SIMATIC ET 200eco PN, CM 4x IO-Link, M12-L Version: V5.1.1   < *
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   Siemens SIMATIC ET 200eco PN, CM 8x IO-Link, M12-L Version: V5.1.1   < *
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   Siemens SIMATIC ET 200eco PN, CM 8x IO-Link, M12-L Version: V5.1.1   < *
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   Siemens SIMATIC ET 200eco PN, DI 16x24VDC, M12-L Version: V5.1.1   < *
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   Siemens SIMATIC ET 200eco PN, DI 8x24VDC, M12-L Version: V5.1.1   < *
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   Siemens SIMATIC ET 200eco PN, DIQ 16x24VDC/2A, M12-L Version: V5.1.1   < *
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   Siemens SIMATIC ET 200eco PN, DQ 8x24VDC/0,5A, M12-L Version: V5.1.1   < *
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   Siemens SIMATIC ET 200eco PN, DQ 8x24VDC/2A, M12-L Version: V5.1.1   < *
 Create a notification for this product.
   Siemens SIMATIC ET 200MP IM 155-5 PN HF Version: V4.2.0   < *
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   Siemens SIMATIC ET 200pro IM 154-8 PN/DP CPU Version: 0   < *
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   Siemens SIMATIC ET 200pro IM 154-8F PN/DP CPU Version: 0   < *
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   Siemens SIMATIC ET 200pro IM 154-8FX PN/DP CPU Version: 0   < *
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   Siemens SIMATIC ET 200S IM 151-8 PN/DP CPU Version: 0   < *
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   Siemens SIMATIC ET 200S IM 151-8F PN/DP CPU Version: 0   < *
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   Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN Version: 0   < *
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   Siemens SIMATIC ET 200SP CPU 1510SP-1 PN Version: 0   < *
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   Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN Version: 0   < *
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   Siemens SIMATIC ET 200SP CPU 1512SP-1 PN Version: 0   < *
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   Siemens SIMATIC ET 200SP IM 155-6 MF HF Version: 0   < *
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   Siemens SIMATIC ET 200SP IM 155-6 PN HA (incl. SIPLUS variants) Version: 0   < V1.3
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   Siemens SIMATIC ET 200SP IM 155-6 PN HF Version: V4.2.0   < *
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   Siemens SIMATIC ET 200SP IM 155-6 PN/2 HF Version: V4.2.0   < *
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   Siemens SIMATIC ET 200SP IM 155-6 PN/3 HF Version: V4.2.0   < *
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   Siemens SIMATIC PN/MF Coupler Version: 0   < *
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   Siemens SIMATIC PN/PN Coupler Version: 0   < V6.0.0
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   Siemens SIMATIC Power Line Booster PLB, Base Module Version: 0   < *
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   Siemens SIMATIC Power Line Booster PLB, Modem Module ST Version: 0   < *
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   Siemens SIMATIC S7-1200 CPU 1211C AC/DC/Rly Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1211C DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1211C DC/DC/Rly Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1212C AC/DC/Rly Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1212C DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1212C DC/DC/Rly Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1212FC DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1212FC DC/DC/Rly Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1214C AC/DC/Rly Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1214C DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1214C DC/DC/Rly Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1214FC DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1214FC DC/DC/Rly Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1215C AC/DC/Rly Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1215C DC/DC/DC Version: 0   < V4.4.0
 Create a notification for this product.
   Siemens SIMATIC S7-1200 CPU 1215C DC/DC/Rly Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1215FC DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1215FC DC/DC/Rly Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1200 CPU 1217C DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIMATIC S7-1500 CPU 1511-1 PN Version: 0   < *
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   Siemens SIMATIC S7-1500 CPU 1511F-1 PN Version: 0   < *
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   Siemens SIMATIC S7-1500 CPU 1513-1 PN Version: 0   < *
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   Siemens SIMATIC S7-1500 CPU 1513F-1 PN Version: 0   < *
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   Siemens SIMATIC S7-1500 CPU 1515-2 PN Version: 0   < *
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   Siemens SIMATIC S7-1500 CPU 1515F-2 PN Version: 0   < *
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   Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP Version: 0   < *
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   Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU CR40 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU CR60 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU SR20 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU SR20 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU SR30 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU SR30 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU SR40 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU SR40 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU SR60 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU SR60 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU ST20 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU ST20 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU ST30 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU ST30 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU ST40 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU ST40 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU ST60 Version: 0   < *
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   Siemens SIMATIC S7-200 SMART CPU ST60 Version: 0   < *
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   Siemens SIMATIC S7-300 CPU 314C-2 PN/DP Version: 0   < *
 Create a notification for this product.
   Siemens SIMATIC S7-300 CPU 315-2 PN/DP Version: 0   < *
 Create a notification for this product.
   Siemens SIMATIC S7-300 CPU 315F-2 PN/DP Version: 0   < *
 Create a notification for this product.
   Siemens SIMATIC S7-300 CPU 315T-3 PN/DP Version: 0   < *
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   Siemens SIMATIC S7-300 CPU 317-2 PN/DP Version: 0   < *
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   Siemens SIMATIC S7-300 CPU 317F-2 PN/DP Version: 0   < *
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   Siemens SIMATIC S7-300 CPU 317T-3 PN/DP Version: 0   < *
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   Siemens SIMATIC S7-300 CPU 317TF-3 PN/DP Version: 0   < *
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   Siemens SIMATIC S7-300 CPU 319-3 PN/DP Version: 0   < *
 Create a notification for this product.
   Siemens SIMATIC S7-300 CPU 319F-3 PN/DP Version: 0   < *
 Create a notification for this product.
   Siemens SIMATIC S7-400 CPU 412-2 PN V7 Version: 0   < *
 Create a notification for this product.
   Siemens SIMATIC S7-400 CPU 414-3 PN/DP V7 Version: 0   < *
 Create a notification for this product.
   Siemens SIMATIC S7-400 CPU 414F-3 PN/DP V7 Version: 0   < *
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   Siemens SIMATIC S7-400 CPU 416-3 PN/DP V7 Version: 0   < *
 Create a notification for this product.
   Siemens SIMATIC S7-400 CPU 416F-3 PN/DP V7 Version: 0   < *
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   Siemens SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants) Version: 0   < *
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   Siemens SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants) Version: 0   < V10.2
 Create a notification for this product.
   Siemens SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants) Version: 0   < V8.3
 Create a notification for this product.
   Siemens SIMATIC TDC CP51M1 Version: 0   < *
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   Siemens SIMATIC TDC CPU555 Version: 0   < *
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   Siemens SIMOCODE pro V Ethernet/IP (incl. SIPLUS variants) Version: 0   < *
 Create a notification for this product.
   Siemens SIMOCODE pro V PROFINET Version: 0   < *
 Create a notification for this product.
   Siemens SINUMERIK 840D sl Version: 0   < *
 Create a notification for this product.
   Siemens SIPLUS ET 200MP IM 155-5 PN HF Version: V4.2.0   < *
 Create a notification for this product.
   Siemens SIPLUS ET 200MP IM 155-5 PN HF Version: V4.2.0   < *
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   Siemens SIPLUS ET 200MP IM 155-5 PN HF T1 RAIL Version: V4.2.0   < *
 Create a notification for this product.
   Siemens SIPLUS ET 200S IM 151-8 PN/DP CPU Version: 0   < *
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   Siemens SIPLUS ET 200S IM 151-8F PN/DP CPU Version: 0   < *
 Create a notification for this product.
   Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN Version: 0   < *
 Create a notification for this product.
   Siemens SIPLUS ET 200SP IM 155-6 PN HF Version: V4.2.0   < *
 Create a notification for this product.
   Siemens SIPLUS ET 200SP IM 155-6 PN HF Version: V4.2.0   < *
 Create a notification for this product.
   Siemens SIPLUS ET 200SP IM 155-6 PN HF Version: V4.2.0   < *
 Create a notification for this product.
   Siemens SIPLUS ET 200SP IM 155-6 PN HF Version: V4.2.0   < *
 Create a notification for this product.
   Siemens SIPLUS ET 200SP IM 155-6 PN HF T1 RAIL Version: V4.2.0   < *
 Create a notification for this product.
   Siemens SIPLUS ET 200SP IM 155-6 PN HF T1 RAIL Version: V4.2.0   < *
 Create a notification for this product.
   Siemens SIPLUS ET 200SP IM 155-6 PN HF TX RAIL Version: V4.2.0   < *
 Create a notification for this product.
   Siemens SIPLUS HCS4200 CIM4210 Version: 0   < *
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   Siemens SIPLUS HCS4200 CIM4210C Version: 0   < *
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   Siemens SIPLUS HCS4300 CIM4310 Version: 0   < *
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   Siemens SIPLUS NET PN/PN Coupler Version: 0   < V6.0.0
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   Siemens SIPLUS S7-1200 CPU 1212 AC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1212 DC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1212 DC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1212C AC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1212C DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1212C DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1212C DC/DC/DC RAIL Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214 AC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214 DC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214C AC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214C AC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214C DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214C DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214C DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214C DC/DC/DC RAIL Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214C DC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214C DC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214FC DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1214FC DC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1215 AC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1215 AC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1215 DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1215 DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1215 DC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1215 DC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1215 DC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1215C AC/DC/RLY Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1215C DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1200 CPU 1215FC DC/DC/DC Version: 0   < V4.4.0
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   Siemens SIPLUS S7-1500 CPU 1511-1 PN Version: 0   < *
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   Siemens SIPLUS S7-1500 CPU 1511F-1 PN Version: 0   < *
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   Siemens SIPLUS S7-1500 CPU 1513-1 PN Version: 0   < *
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   Siemens SIPLUS S7-1500 CPU 1513F-1 PN Version: 0   < *
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   Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP Version: 0   < *
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   Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP Version: 0   < *
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   Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP Version: 0   < *
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   Siemens SIPLUS S7-300 CPU 314C-2 PN/DP Version: 0   < *
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   Siemens SIPLUS S7-300 CPU 315-2 PN/DP Version: 0   < *
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   Siemens SIPLUS S7-300 CPU 315F-2 PN/DP Version: 0   < *
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   Siemens SIPLUS S7-300 CPU 317-2 PN/DP Version: 0   < *
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   Siemens SIPLUS S7-300 CPU 317F-2 PN/DP Version: 0   < *
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   Siemens SIPLUS S7-400 CPU 414-3 PN/DP V7 Version: 0   < *
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   Siemens SIPLUS S7-400 CPU 416-3 PN/DP V7 Version: 0   < *
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   Siemens SIWAREX WP231 Version: 0   < *
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   Siemens SIWAREX WP241 Version: 0   < *
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   Siemens SIWAREX WP251 Version: 0   < *
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   Siemens SIWAREX WP521 ST Version: 0   < *
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   Siemens SIWAREX WP522 ST Version: 0   < *
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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-40820",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-09T15:52:45.674847Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-09T15:55:23.400Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "SIDOOR ATD430W",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "*",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIDOOR ATE530G COATED",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "*",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIDOOR ATE530S COATED",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "*",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC CFU DIQ",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "V2.0.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC CFU PA",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "V2.0.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC CFU PA",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "V2.0.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC ET 200AL IM 157-1 PN",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "*",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC ET 200clean, CM 8x IO-Link",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "*",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC ET 200clean, DI 16x24VDC",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "*",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC ET 200clean, DIQ 16x24VDC/0,5A",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "*",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
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          "defaultStatus": "unknown",
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.