Vulnerability-Lookup

CNVD-2026-27668

Vulnerability from cnvd - Published: 2026-07-16

Title

Tenda cp3 Range header字段缓冲区溢出漏洞

Description

Tenda cp3是中国Tenda公司的一款网络通信设备。 Tenda CP3存在缓冲区溢出漏洞。该漏洞源于RTSP服务在处理PLAY请求时未对Range header字段中的clock=值长度进行验证，攻击者可利用该漏洞崽完成标准RTSP会话握手后，可通过发送过长的clock=值的PLAY请求导致RTSP服务崩溃。

Severity

高

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.tenda.com.cn/support/security-advisory/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-51601

Impacted products

Name
Tenda CP3 V3.0

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-51601",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-51601"
    }
  },
  "description": "Tenda cp3\u662f\u4e2d\u56fdTenda\u516c\u53f8\u7684\u4e00\u6b3e\u7f51\u7edc\u901a\u4fe1\u8bbe\u5907\u3002\n\nTenda CP3\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8eRTSP\u670d\u52a1\u5728\u5904\u7406PLAY\u8bf7\u6c42\u65f6\u672a\u5bf9Range header\u5b57\u6bb5\u4e2d\u7684clock=\u503c\u957f\u5ea6\u8fdb\u884c\u9a8c\u8bc1\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5d3d\u5b8c\u6210\u6807\u51c6RTSP\u4f1a\u8bdd\u63e1\u624b\u540e\uff0c\u53ef\u901a\u8fc7\u53d1\u9001\u8fc7\u957f\u7684clock=\u503c\u7684PLAY\u8bf7\u6c42\u5bfc\u81f4RTSP\u670d\u52a1\u5d29\u6e83\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.tenda.com.cn/support/security-advisory/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-27668",
  "openTime": "2026-07-16",
  "products": {
    "product": "Tenda CP3 V3.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-51601",
  "serverity": "\u9ad8",
  "submitTime": "2026-07-15",
  "title": "Tenda cp3 Range header\u5b57\u6bb5\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2026-51601 (GCVE-0-2026-51601)

Vulnerability from cvelistv5 – Published: 2026-07-09 00:00 – Updated: 2026-07-10 17:28

Summary

Tenda CP3 V3.0 firmware V31.1.9.91 contains a stack-based buffer overflow in the RTSP service. The device fails to validate the length of the clock= value in the Range header field when processing a PLAY request. An unauthenticated remote attacker who has completed a standard RTSP session handshake can send a PLAY request with an excessively long clock= value to cause the RTSP service to crash.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-10 17:24 UTC

CWE

n/a
CWE-121 - Stack-based Buffer Overflow

Assigner

mitre CNA under the mitre root

CNA scorecard E 27/100 over 2318 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/kkkk2222874/cve_ID_report/blob…

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-51601",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-10T17:24:24.016473Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-121",
                "description": "CWE-121 Stack-based Buffer Overflow",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-10T17:28:02.194Z",
          "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 CP3 V3.0 firmware V31.1.9.91 contains a stack-based buffer overflow in the RTSP service. The device fails to validate the length of the clock= value in the Range header field when processing a PLAY request. An unauthenticated remote attacker who has completed a standard RTSP session handshake can send a PLAY request with an excessively long clock= value to cause the RTSP service to crash."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-09T16:40:40.183Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/kkkk2222874/cve_ID_report/blob/main/Tenda_CP3_V3.0/Tenda_CP3_V3.0_2th/README.md"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-51601",
    "datePublished": "2026-07-09T00:00:00.000Z",
    "dateReserved": "2026-06-08T00:00:00.000Z",
    "dateUpdated": "2026-07-10T17:28:02.194Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.
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CNVD-2026-27668

CVE-2026-51601 (GCVE-0-2026-51601)

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