Vulnerability-Lookup

CNVD-2025-19878

Vulnerability from cnvd - Published: 2025-08-29

Title

D-Link DSL-7740C存在未明漏洞

Description

D-Link DSL-7740C是中国友讯（D-Link）公司的一款调制解调器。 D-Link DSL-7740C存在安全漏洞，攻击者可利用该漏洞通过暴力攻击升级权限。

Severity

中

Formal description

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://www.dlink.com/en/security-bulletin/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2025-29521

Impacted products

Name
D-Link DSL-7740C DSL7740C.V6.TR069.20211230

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2025-29521",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2025-29521"
    }
  },
  "description": "D-Link DSL-7740C\u662f\u4e2d\u56fd\u53cb\u8baf\uff08D-Link\uff09\u516c\u53f8\u7684\u4e00\u6b3e\u8c03\u5236\u89e3\u8c03\u5668\u3002\n\nD-Link DSL-7740C\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u66b4\u529b\u653b\u51fb\u5347\u7ea7\u6743\u9650\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttps://www.dlink.com/en/security-bulletin/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2025-19878",
  "openTime": "2025-08-29",
  "products": {
    "product": "D-Link DSL-7740C DSL7740C.V6.TR069.20211230"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2025-29521",
  "serverity": "\u4e2d",
  "submitTime": "2025-08-28",
  "title": "D-Link DSL-7740C\u5b58\u5728\u672a\u660e\u6f0f\u6d1e"
}

CVE-2025-29521 (GCVE-0-2025-29521)

Vulnerability from cvelistv5 – Published: 2025-08-25 00:00 – Updated: 2025-08-26 16:01

Summary

Insecure default credentials for the Adminsitrator account of D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 allows attackers to escalate privileges via a bruteforce attack.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-26 16:00 UTC

CWE

n/a
CWE-1392 - Use of Default Credentials

Assigner

mitre mitre root

References

2 references

URL	Tags
https://www.dlink.com/en/security-bulletin/
https://gist.github.com/stevenyu113228/73f06459df…

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-29521",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-26T16:00:46.746439Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-1392",
                "description": "CWE-1392 Use of Default Credentials",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-26T16:01:12.777Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Insecure default credentials for the Adminsitrator account of D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 allows attackers to escalate privileges via a bruteforce attack."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "description": "n/a",
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              "type": "text"
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      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-25T14:24:19.284Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://www.dlink.com/en/security-bulletin/"
        },
        {
          "url": "https://gist.github.com/stevenyu113228/73f06459df5ac3257ff451e382497832"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2025-29521",
    "datePublished": "2025-08-25T00:00:00.000Z",
    "dateReserved": "2025-03-11T00:00:00.000Z",
    "dateUpdated": "2025-08-26T16:01:12.777Z",
    "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.

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.