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EUVD-2026-231909

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 06:53

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T06:53:26.498215+00:00",
  "id": "EUVD-2026-231909"
}

CVE-2021-37204 (GCVE-0-2021-37204)

Vulnerability from cvelistv5 – Published: 2022-02-09 15:16 – Updated: 2025-04-18 18:33

Summary

A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC Drive Controller family (All versions >= V2.9.2 < V2.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V21.9), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V21.9 < V21.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 Ready4Linux (All versions), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.5.0), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions >= V4.5.0 < V4.5.2), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V2.9.2), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.9.2 < V2.9.4), SIMATIC S7-1500 Software Controller (All versions < V21.9), SIMATIC S7-1500 Software Controller (All versions >= V21.9 < V21.9.4), SIMATIC S7-PLCSIM Advanced (All versions < V4.0), SIMATIC S7-PLCSIM Advanced (All versions >= V4.0 < V4.0 SP1), SIPLUS TIM 1531 IRC (All versions < V2.3.6), TIM 1531 IRC (All versions < V2.3.6). An unauthenticated attacker could cause a denial-of-service condition in a PLC when sending specially prepared packet over port 102/tcp. A restart of the affected device is needed to restore normal operations.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-18 15:12 UTC

CWE

CWE-672 - Operation on a Resource after Expiration or Release

Assigner

siemens icscert root Scorecard

References

1 reference

URL	Tags
https://cert-portal.siemens.com/productcert/pdf/s…

Impacted products

16 products

Vendor	Product	Version
Siemens	SIMATIC Drive Controller family	Affected: All versions < V2.9.2
Siemens	SIMATIC Drive Controller family	Affected: All versions >= V2.9.2 < V2.9.4
Siemens	SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants)	Affected: All versions
Siemens	SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)	Affected: All versions < V21.9
Siemens	SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)	Affected: All versions >= V21.9 < V21.9.4
Siemens	SIMATIC ET 200SP Open Controller CPU 1515SP PC2 Ready4Linux	Affected: All versions
Siemens	SIMATIC S7-1200 CPU family (incl. SIPLUS variants)	Affected: All versions < V4.5.0
Siemens	SIMATIC S7-1200 CPU family (incl. SIPLUS variants)	Affected: All versions >= V4.5.0 < V4.5.2
Siemens	SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)	Affected: All versions < V2.9.2
Siemens	SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)	Affected: All versions >= V2.9.2 < V2.9.4
Siemens	SIMATIC S7-1500 Software Controller	Affected: All versions < V21.9
Siemens	SIMATIC S7-1500 Software Controller	Affected: All versions >= V21.9 < V21.9.4
Siemens	SIMATIC S7-PLCSIM Advanced	Affected: All versions < V4.0
Siemens	SIMATIC S7-PLCSIM Advanced	Affected: All versions >= V4.0 < V4.0 SP1
Siemens	SIPLUS TIM 1531 IRC	Affected: All versions < V2.3.6
Siemens	TIM 1531 IRC	Affected: All versions < V2.3.6

Show details on NVD website

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T01:16:03.812Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-838121.pdf"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-37204",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-18T15:12:37.070496Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-18T18:33:01.575Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC Drive Controller family",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003c V2.9.2"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC Drive Controller family",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003e= V2.9.2 \u003c V2.9.4"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants)",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003c V21.9"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003e= V21.9 \u003c V21.9.4"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC ET 200SP Open Controller CPU 1515SP PC2 Ready4Linux",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-1200 CPU family (incl. SIPLUS variants)",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003c V4.5.0"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-1200 CPU family (incl. SIPLUS variants)",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003e= V4.5.0 \u003c V4.5.2"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003c V2.9.2"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003e= V2.9.2 \u003c V2.9.4"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-1500 Software Controller",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003c V21.9"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-1500 Software Controller",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003e= V21.9 \u003c V21.9.4"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-PLCSIM Advanced",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003c V4.0"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-PLCSIM Advanced",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003e= V4.0 \u003c V4.0 SP1"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SIPLUS TIM 1531 IRC",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003c V2.3.6"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "TIM 1531 IRC",
          "vendor": "Siemens",
          "versions": [
            {
              "status": "affected",
              "version": "All versions \u003c V2.3.6"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability has been identified in SIMATIC Drive Controller family (All versions \u003c V2.9.2), SIMATIC Drive Controller family (All versions \u003e= V2.9.2 \u003c V2.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions \u003c V21.9), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions \u003e= V21.9 \u003c V21.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 Ready4Linux (All versions), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions \u003c V4.5.0), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions \u003e= V4.5.0 \u003c V4.5.2), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions \u003c V2.9.2), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions \u003e= V2.9.2 \u003c V2.9.4), SIMATIC S7-1500 Software Controller (All versions \u003c V21.9), SIMATIC S7-1500 Software Controller (All versions \u003e= V21.9 \u003c V21.9.4), SIMATIC S7-PLCSIM Advanced (All versions \u003c V4.0), SIMATIC S7-PLCSIM Advanced (All versions \u003e= V4.0 \u003c V4.0 SP1), SIPLUS TIM 1531 IRC (All versions \u003c V2.3.6), TIM 1531 IRC (All versions \u003c V2.3.6). An unauthenticated attacker could cause a denial-of-service condition in a PLC when sending specially prepared packet over port 102/tcp. A restart of the affected device is needed to restore normal operations."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-672",
              "description": "CWE-672: Operation on a Resource after Expiration or Release",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-04-11T09:01:54.435Z",
        "orgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
        "shortName": "siemens"
      },
      "references": [
        {
          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-838121.pdf"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
    "assignerShortName": "siemens",
    "cveId": "CVE-2021-37204",
    "datePublished": "2022-02-09T15:16:56.000Z",
    "dateReserved": "2021-07-21T00:00:00.000Z",
    "dateUpdated": "2025-04-18T18:33:01.575Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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EUVD-2026-231909

CVE-2021-37204 (GCVE-0-2021-37204)

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