Vulnerability-Lookup

CNVD-2026-34634

Vulnerability from cnvd - Published: 2026-08-26

Title

Tenda W20E缓冲区溢出漏洞（CNVD-2026-34634）

Description

Tenda W20E是深圳市吉祥腾达科技有限公司推出的企业级无线路由器。 Tenda W20E存在缓冲区溢出漏洞，该漏洞源于通过函数formSetSysTime发现包含缓冲区溢出漏洞。攻击者可利用该漏洞执行非授权指令，可以取得系统特权，进而进行各种非法操作。

Severity

高

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://tenda.com.cn/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2023-26806

Impacted products

Name
Tenda W20E v15.11.0.6（US_W20EV4.0br_v15.11.0.6(1068_1546_841)_CN_TDC）

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2023-26806",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2023-26806"
    }
  },
  "description": "Tenda W20E\u662f\u6df1\u5733\u5e02\u5409\u7965\u817e\u8fbe\u79d1\u6280\u6709\u9650\u516c\u53f8\u63a8\u51fa\u7684\u4f01\u4e1a\u7ea7\u65e0\u7ebf\u8def\u7531\u5668\u3002\n\nTenda W20E\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u901a\u8fc7\u51fd\u6570formSetSysTime\u53d1\u73b0\u5305\u542b\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u6267\u884c\u975e\u6388\u6743\u6307\u4ee4\uff0c\u53ef\u4ee5\u53d6\u5f97\u7cfb\u7edf\u7279\u6743\uff0c\u8fdb\u800c\u8fdb\u884c\u5404\u79cd\u975e\u6cd5\u64cd\u4f5c\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://tenda.com.cn/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-34634",
  "openTime": "2026-08-26",
  "products": {
    "product": "Tenda W20E v15.11.0.6\uff08US_W20EV4.0br_v15.11.0.6(1068_1546_841)_CN_TDC\uff09"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2023-26806",
  "serverity": "\u9ad8",
  "submitTime": "2023-04-04",
  "title": "Tenda W20E\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2026-34634\uff09"
}

CVE-2023-26806 (GCVE-0-2023-26806)

Vulnerability from cvelistv5 – Published: 2023-03-19 00:00 – Updated: 2025-02-27 16:20

Summary

Tenda W20E v15.11.0.6(US_W20EV4.0br_v15.11.0.6(1068_1546_841 is vulnerable to Buffer Overflow via function formSetSysTime,

Severity

9.8 (Critical)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-27 16:19 UTC

CWE

n/a
CWE-787 - Out-of-bounds Write

Assigner

mitre mitre root

References

1 reference

URL	Tags
https://github.com/Stevenbaga/fengsha/blob/main/W…

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T11:53:54.585Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/Stevenbaga/fengsha/blob/main/W20E/SetSysTime.md"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2023-26806",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-27T16:19:51.647649Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-787",
                "description": "CWE-787 Out-of-bounds Write",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-27T16:20:13.877Z",
          "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": "Tenda W20E v15.11.0.6(US_W20EV4.0br_v15.11.0.6(1068_1546_841 is vulnerable to Buffer Overflow via function formSetSysTime,"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-03-19T00:00:00.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/Stevenbaga/fengsha/blob/main/W20E/SetSysTime.md"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2023-26806",
    "datePublished": "2023-03-19T00:00:00.000Z",
    "dateReserved": "2023-02-27T00:00:00.000Z",
    "dateUpdated": "2025-02-27T16:20:13.877Z",
    "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.

Action not permitted

CNVD-2026-34634

CVE-2023-26806 (GCVE-0-2023-26806)

Tags

Sightings

Nomenclature