Vulnerability-Lookup

CNVD-2026-34874

Vulnerability from cnvd - Published: 2026-09-02

Title

Siemens LOGO! Soft Comfort加密问题漏洞（CNVD-2026-34874）

Description

Siemens LOGO! Soft Comfort是德国Siemens公司的一款工业控制编程软件。 Siemens LOGO! Soft Comfort存在加密问题漏洞，该漏洞源于使用静态硬编码的AES主密钥加密项目文件，攻击者可利用该漏洞从应用程序文件或内存中提取主密钥并解密项目文件或完全删除项目密码。

Severity

中

Patch Name

Siemens LOGO! Soft Comfort加密问题漏洞（CNVD-2026-34874）的补丁

Patch Description

Siemens LOGO! Soft Comfort是德国Siemens公司的一款工业控制编程软件。 Siemens LOGO! Soft Comfort存在加密问题漏洞，该漏洞源于使用静态硬编码的AES主密钥加密项目文件，攻击者可利用该漏洞从应用程序文件或内存中提取主密钥并解密项目文件或完全删除项目密码。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

目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载： https://cert-portal.siemens.com/productcert/html/ssa-751328.html

Reference

https://cert-portal.siemens.com/productcert/html/ssa-751328.html

Impacted products

Name
Siemens LOGO! Soft Comfort <V9

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-57262",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-57262"
    }
  },
  "description": "Siemens LOGO! Soft Comfort\u662f\u5fb7\u56fdSiemens\u516c\u53f8\u7684\u4e00\u6b3e\u5de5\u4e1a\u63a7\u5236\u7f16\u7a0b\u8f6f\u4ef6\u3002\n\nSiemens LOGO! Soft Comfort\u5b58\u5728\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4f7f\u7528\u9759\u6001\u786c\u7f16\u7801\u7684AES\u4e3b\u5bc6\u94a5\u52a0\u5bc6\u9879\u76ee\u6587\u4ef6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u4ece\u5e94\u7528\u7a0b\u5e8f\u6587\u4ef6\u6216\u5185\u5b58\u4e2d\u63d0\u53d6\u4e3b\u5bc6\u94a5\u5e76\u89e3\u5bc6\u9879\u76ee\u6587\u4ef6\u6216\u5b8c\u5168\u5220\u9664\u9879\u76ee\u5bc6\u7801\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u8fd9\u4e2a\u5b89\u5168\u95ee\u9898\uff0c\u8bf7\u5230\u5382\u5546\u7684\u4e3b\u9875\u4e0b\u8f7d\uff1a\r\nhttps://cert-portal.siemens.com/productcert/html/ssa-751328.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-34874",
  "openTime": "2026-09-02",
  "patchDescription": "Siemens LOGO! Soft Comfort\u662f\u5fb7\u56fdSiemens\u516c\u53f8\u7684\u4e00\u6b3e\u5de5\u4e1a\u63a7\u5236\u7f16\u7a0b\u8f6f\u4ef6\u3002\r\n\r\nSiemens LOGO! Soft Comfort\u5b58\u5728\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4f7f\u7528\u9759\u6001\u786c\u7f16\u7801\u7684AES\u4e3b\u5bc6\u94a5\u52a0\u5bc6\u9879\u76ee\u6587\u4ef6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u4ece\u5e94\u7528\u7a0b\u5e8f\u6587\u4ef6\u6216\u5185\u5b58\u4e2d\u63d0\u53d6\u4e3b\u5bc6\u94a5\u5e76\u89e3\u5bc6\u9879\u76ee\u6587\u4ef6\u6216\u5b8c\u5168\u5220\u9664\u9879\u76ee\u5bc6\u7801\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": "Siemens LOGO! Soft Comfort\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2026-34874\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Siemens LOGO! Soft Comfort \u003cV9"
  },
  "referenceLink": "https://cert-portal.siemens.com/productcert/html/ssa-751328.html",
  "serverity": "\u4e2d",
  "submitTime": "2026-08-20",
  "title": "Siemens LOGO! Soft Comfort\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2026-34874\uff09"
}

CVE-2026-57262 (GCVE-0-2026-57262)

Vulnerability from cvelistv5 – Published: 2026-08-11 12:20 – Updated: 2026-08-12 19:20

Summary

A vulnerability has been identified in LOGO! Soft Comfort (All versions < V9). Affected products use a static, hardcoded AES master key to encrypt project files. This could allow a local attacker to extract the master key from the application files or memory and use it to decrypt project files or remove project passwords entirely without knowing the actual user-defined password.

Severity

6.8 (Medium)


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

7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 18:07 UTC

CWE

CWE-321 - Use of Hard-coded Cryptographic Key

Assigner

siemens icscert root

References

1 reference

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

Impacted products

1 product

Vendor	Product	Version
Siemens	LOGO! Soft Comfort	Affected: 0 , < V9 (custom)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-57262",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-12T18:07:20.598978Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-12T19:20:07.024Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "LOGO! Soft Comfort",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "V9",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability has been identified in LOGO! Soft Comfort (All versions \u003c V9). Affected products use a static, hardcoded AES master key to encrypt project files. This could allow a local attacker to extract the master key from the application files or memory and use it to decrypt project files or remove project passwords entirely without knowing the actual user-defined password."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
            "version": "3.1"
          }
        },
        {
          "cvssV4_0": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-321",
              "description": "CWE-321: Use of Hard-coded Cryptographic Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-11T12:20:21.896Z",
        "orgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
        "shortName": "siemens"
      },
      "references": [
        {
          "url": "https://cert-portal.siemens.com/productcert/html/ssa-751328.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
    "assignerShortName": "siemens",
    "cveId": "CVE-2026-57262",
    "datePublished": "2026-08-11T12:20:21.896Z",
    "dateReserved": "2026-06-24T04:43:34.162Z",
    "dateUpdated": "2026-08-12T19:20:07.024Z",
    "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.

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.

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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.

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CNVD-2026-34874

CVE-2026-57262 (GCVE-0-2026-57262)

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Nomenclature

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