Vulnerability-Lookup

CNVD-2026-30691

Vulnerability from cnvd - Published: 2026-08-04

Title

SIMATIC CN 4100资源管理错误漏洞

Description

SIMATIC CN 4100是一款Siemens工业通信设备，用于工业网络连接和控制通信。 Siemens SIMATIC CN 4100存在资源管理错误漏洞。该漏洞产生的原因是应用程序未正确限制未经身份验证的连接请求。攻击者可利用该漏洞耗尽设备资源并扰乱正常操作。

Severity

高

Patch Name

SIMATIC CN 4100资源管理错误漏洞的补丁

Patch Description

SIMATIC CN 4100是一款Siemens工业通信设备，用于工业网络连接和控制通信。 Siemens SIMATIC CN 4100存在资源管理错误漏洞。该漏洞产生的原因是应用程序未正确限制未经身份验证的连接请求。攻击者可利用该漏洞耗尽设备资源并扰乱正常操作。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://cert-portal.siemens.com/productcert/html/ssa-032379.html

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-22924

Impacted products

Name
Siemens SIMATIC CN 4100 <V5.0

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-22924",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-22924"
    }
  },
  "description": "SIMATIC CN 4100\u662f\u4e00\u6b3eSiemens\u5de5\u4e1a\u901a\u4fe1\u8bbe\u5907\uff0c\u7528\u4e8e\u5de5\u4e1a\u7f51\u7edc\u8fde\u63a5\u548c\u63a7\u5236\u901a\u4fe1\u3002\n\nSiemens SIMATIC CN 4100\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662f\u5e94\u7528\u7a0b\u5e8f\u672a\u6b63\u786e\u9650\u5236\u672a\u7ecf\u8eab\u4efd\u9a8c\u8bc1\u7684\u8fde\u63a5\u8bf7\u6c42\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u8017\u5c3d\u8bbe\u5907\u8d44\u6e90\u5e76\u6270\u4e71\u6b63\u5e38\u64cd\u4f5c\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://cert-portal.siemens.com/productcert/html/ssa-032379.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-30691",
  "openTime": "2026-08-04",
  "patchDescription": "SIMATIC CN 4100\u662f\u4e00\u6b3eSiemens\u5de5\u4e1a\u901a\u4fe1\u8bbe\u5907\uff0c\u7528\u4e8e\u5de5\u4e1a\u7f51\u7edc\u8fde\u63a5\u548c\u63a7\u5236\u901a\u4fe1\u3002\r\n\r\nSiemens SIMATIC CN 4100\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662f\u5e94\u7528\u7a0b\u5e8f\u672a\u6b63\u786e\u9650\u5236\u672a\u7ecf\u8eab\u4efd\u9a8c\u8bc1\u7684\u8fde\u63a5\u8bf7\u6c42\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u8017\u5c3d\u8bbe\u5907\u8d44\u6e90\u5e76\u6270\u4e71\u6b63\u5e38\u64cd\u4f5c\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "SIMATIC CN 4100\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Siemens SIMATIC CN 4100 \u003cV5.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-22924",
  "serverity": "\u9ad8",
  "submitTime": "2026-05-20",
  "title": "SIMATIC CN 4100\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2026-22924 (GCVE-0-2026-22924)

Vulnerability from cvelistv5 – Published: 2026-05-12 08:20 – Updated: 2026-05-13 09:51

Summary

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V5.0). The affected application does not properly restrict unauthenticated connections and is susceptible to resource exhaustion conditions. This could allow an attacker to disrupt normal operations or perform unauthorized actions, potentially impacting system availability and integrity.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-13 01:40 UTC

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

siemens icscert root

References

1 reference

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

Impacted products

1 product

Vendor	Product	Version
Siemens	SIMATIC CN 4100	Affected: 0 , < V5.0 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-22924",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-13T01:40:31.029305Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-13T09:51:24.816Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC CN 4100",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "V5.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability has been identified in SIMATIC CN 4100 (All versions \u003c V5.0). The affected application does not properly restrict unauthenticated connections and is susceptible to resource exhaustion conditions.\r\nThis could allow an attacker to disrupt normal operations or perform unauthorized actions, potentially impacting system availability and integrity."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
            "version": "3.1"
          }
        },
        {
          "cvssV4_0": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306: Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-12T08:20:55.135Z",
        "orgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
        "shortName": "siemens"
      },
      "references": [
        {
          "url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
    "assignerShortName": "siemens",
    "cveId": "CVE-2026-22924",
    "datePublished": "2026-05-12T08:20:55.135Z",
    "dateReserved": "2026-01-13T15:21:45.768Z",
    "dateUpdated": "2026-05-13T09:51:24.816Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.