Vulnerability-Lookup

CNVD-2025-24482

Vulnerability from cnvd - Published: 2025-10-21

Title

Tenda AC20硬编码凭证漏洞

Description

Tenda AC20是一款由腾达（Tenda）推出的家庭路由器。 Tenda AC20存在硬编码凭证漏洞，该漏洞源于文件/etc_ro/shadow中存在硬编码凭证。攻击者可利用该漏洞导致机密性受影响。

Severity

低

Formal description

目前厂商尚未发布升级程序修复该安全问题，详情见厂商官网： https://www.tenda.com.cn/

Reference

https://github.com/ZZ2266/.github.io/blob/main/AC20/hardcoded%20password/readme.md#description

Impacted products

Name
Tenda AC20 16.03.08.12

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2025-9091",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2025-9091"
    }
  },
  "description": "Tenda AC20\u662f\u4e00\u6b3e\u7531\u817e\u8fbe\uff08Tenda\uff09\u63a8\u51fa\u7684\u5bb6\u5ead\u8def\u7531\u5668\u3002\n\nTenda AC20\u5b58\u5728\u786c\u7f16\u7801\u51ed\u8bc1\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u6587\u4ef6/etc_ro/shadow\u4e2d\u5b58\u5728\u786c\u7f16\u7801\u51ed\u8bc1\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u673a\u5bc6\u6027\u53d7\u5f71\u54cd\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5c1a\u672a\u53d1\u5e03\u5347\u7ea7\u7a0b\u5e8f\u4fee\u590d\u8be5\u5b89\u5168\u95ee\u9898\uff0c\u8be6\u60c5\u89c1\u5382\u5546\u5b98\u7f51\uff1a\r\nhttps://www.tenda.com.cn/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2025-24482",
  "openTime": "2025-10-21",
  "products": {
    "product": "Tenda AC20 16.03.08.12"
  },
  "referenceLink": "https://github.com/ZZ2266/.github.io/blob/main/AC20/hardcoded%20password/readme.md#description",
  "serverity": "\u4f4e",
  "submitTime": "2025-08-20",
  "title": "Tenda AC20\u786c\u7f16\u7801\u51ed\u8bc1\u6f0f\u6d1e"
}

CVE-2025-9091 (GCVE-0-2025-9091)

Vulnerability from cvelistv5 – Published: 2025-08-17 02:32 – Updated: 2025-08-18 13:15

Title

Tenda AC20 shadow hard-coded credentials

Summary

A security flaw has been discovered in Tenda AC20 16.03.08.12. Affected by this vulnerability is an unknown functionality of the file /etc_ro/shadow. The manipulation leads to hard-coded credentials. It is possible to launch the attack on the local host. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.

Severity

2 (Low)


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

2.5 (Low)


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

2.5 (Low)


                        
                          CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-18 13:15 UTC

CWE

CWE-798 - Hard-coded Credentials
CWE-259 - Use of Hard-coded Password

Assigner

VulDB mitre root

References

7 references

URL	Tags
https://vuldb.com/?id.320359	vdb-entry
https://vuldb.com/?ctiid.320359	signaturepermissions-required
https://vuldb.com/?submit.632268	third-party-advisory
https://github.com/ZZ2266/.github.io/tree/main/AC…	related
https://github.com/ZZ2266/.github.io/blob/main/AC…	exploit
https://www.tenda.com.cn/	product
https://github.com/ZZ2266/.github.io/blob/main/AC…	exploit

Impacted products

1 product

Vendor	Product	Version
Tenda	AC20	Affected: 16.03.08.12

Credits

n0ps1ed (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-9091",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-18T13:15:15.497583Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-18T13:15:19.094Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/ZZ2266/.github.io/blob/main/AC20/hardcoded%20password/readme.md#description"
          },
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/ZZ2266/.github.io/blob/main/AC20/hardcoded%20password/readme.md"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "AC20",
          "vendor": "Tenda",
          "versions": [
            {
              "status": "affected",
              "version": "16.03.08.12"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "n0ps1ed (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A security flaw has been discovered in Tenda AC20 16.03.08.12. Affected by this vulnerability is an unknown functionality of the file /etc_ro/shadow. The manipulation leads to hard-coded credentials. It is possible to launch the attack on the local host. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used."
        },
        {
          "lang": "de",
          "value": "In Tenda AC20 16.03.08.12 ist eine Schwachstelle entdeckt worden. Hierbei betrifft es unbekannten Programmcode der Datei /etc_ro/shadow. Mittels Manipulieren mit unbekannten Daten kann eine hard-coded credentials-Schwachstelle ausgenutzt werden. Der Angriff muss lokal angegangen werden. Die Komplexit\u00e4t eines Angriffs ist eher hoch. Sie gilt als schwierig ausnutzbar. Der Exploit steht zur \u00f6ffentlichen Verf\u00fcgung."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 2,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 2.5,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 2.5,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 1,
            "vectorString": "AV:L/AC:H/Au:S/C:P/I:N/A:N/E:POC/RL:ND/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-798",
              "description": "Hard-coded Credentials",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-259",
              "description": "Use of Hard-coded Password",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-17T02:32:09.136Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-320359 | Tenda AC20 shadow hard-coded credentials",
          "tags": [
            "vdb-entry"
          ],
          "url": "https://vuldb.com/?id.320359"
        },
        {
          "name": "VDB-320359 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/?ctiid.320359"
        },
        {
          "name": "Submit #632268 | Tenda AC20 V16.03.08.12 Hard-coded Credentials",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/?submit.632268"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://github.com/ZZ2266/.github.io/tree/main/AC20/hardcoded%20password/readme.md"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/ZZ2266/.github.io/blob/main/AC20/hardcoded%20password/readme.md#description"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.tenda.com.cn/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2025-08-16T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2025-08-16T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2025-08-16T08:11:39.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "Tenda AC20 shadow hard-coded credentials"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2025-9091",
    "datePublished": "2025-08-17T02:32:09.136Z",
    "dateReserved": "2025-08-16T06:06:25.733Z",
    "dateUpdated": "2025-08-18T13:15:19.094Z",
    "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.