Vulnerability-Lookup

CNVD-2026-34116

Vulnerability from cnvd - Published: 2026-08-26

Title

Tenda CP3拒绝服务漏洞

Description

Tenda CP3是腾达（Tenda）品牌推出的‌室内智能无线云台监控摄像机‌系列。 Tenda CP3存在拒绝服务漏洞，该漏洞源于未验证RTSP请求中的Content-Length标头字段，导致RTSP解析器进入持久等待消息体状态，进而使TCP连接永久性非活动且未主动关闭，造成TCP资源泄漏，攻击者可利用该漏洞导致拒绝服务。

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://www.tenda.com.cn/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-51600

Impacted products

Name
Tenda CP3 V3.0

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-51600",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-51600"
    }
  },
  "description": "Tenda CP3\u662f\u817e\u8fbe\uff08Tenda\uff09\u54c1\u724c\u63a8\u51fa\u7684\u200c\u5ba4\u5185\u667a\u80fd\u65e0\u7ebf\u4e91\u53f0\u76d1\u63a7\u6444\u50cf\u673a\u200c\u7cfb\u5217\u3002\n\nTenda CP3\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u672a\u9a8c\u8bc1RTSP\u8bf7\u6c42\u4e2d\u7684Content-Length\u6807\u5934\u5b57\u6bb5\uff0c\u5bfc\u81f4RTSP\u89e3\u6790\u5668\u8fdb\u5165\u6301\u4e45\u7b49\u5f85\u6d88\u606f\u4f53\u72b6\u6001\uff0c\u8fdb\u800c\u4f7fTCP\u8fde\u63a5\u6c38\u4e45\u6027\u975e\u6d3b\u52a8\u4e14\u672a\u4e3b\u52a8\u5173\u95ed\uff0c\u9020\u6210TCP\u8d44\u6e90\u6cc4\u6f0f\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\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-2026-34116",
  "openTime": "2026-08-26",
  "products": {
    "product": "Tenda CP3 V3.0"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-51600",
  "serverity": "\u9ad8",
  "submitTime": "2026-07-15",
  "title": "Tenda CP3\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2026-51600 (GCVE-0-2026-51600)

Vulnerability from cvelistv5 – Published: 2026-07-09 00:00 – Updated: 2026-07-09 17:43

Summary

Tenda CP3 V3.0 firmware V31.1.9.91 does not validate the Content-Length header field in RTSP requests (including DESCRIBE, SETUP, and PLAY methods). When a request carrying a Content-Length header is received without a corresponding message body, the RTSP parser enters a persistent body-awaiting state, causing the affected TCP connection to become permanently non-functional. The device does not actively close the connection, resulting in a TCP resource leak. This issue can be exploited by an unauthenticated remote attacker to cause a denial-of-service condition.

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: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-09 17:42 UTC

CWE

n/a
CWE-400 - Uncontrolled Resource Consumption
CWE-703 - Improper Check or Handling of Exceptional Conditions

Assigner

mitre mitre root Scorecard

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-2026-51600",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-09T17:42:46.812864Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-400",
                "description": "CWE-400 Uncontrolled Resource Consumption",
                "lang": "en",
                "type": "CWE"
              }
            ]
          },
          {
            "descriptions": [
              {
                "cweId": "CWE-703",
                "description": "CWE-703 Improper Check or Handling of Exceptional Conditions",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-09T17:43:42.929Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/kkkk2222874/cve_ID_report/blob/main/Tenda_CP3_V3.0/Tenda_CP3_V3.0/Tenda_CP3_V3.0_1th/README.md"
          }
        ],
        "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 does not validate the Content-Length header field in RTSP requests (including DESCRIBE, SETUP, and PLAY methods). When a request carrying a Content-Length header is received without a corresponding message body, the RTSP parser enters a persistent body-awaiting state, causing the affected TCP connection to become permanently non-functional. The device does not actively close the connection, resulting in a TCP resource leak. This issue can be exploited by an unauthenticated remote attacker to cause a denial-of-service condition."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-09T16:38:56.292Z",
        "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/Tenda_CP3_V3.0_1th/README.md"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-51600",
    "datePublished": "2026-07-09T00:00:00.000Z",
    "dateReserved": "2026-06-08T00:00:00.000Z",
    "dateUpdated": "2026-07-09T17:43:42.929Z",
    "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.
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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.

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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-2026-34116

CVE-2026-51600 (GCVE-0-2026-51600)

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