Vulnerability-Lookup

CNVD-2026-30685

Vulnerability from cnvd - Published: 2026-08-04

Title

TP-Link Tapo C520WS v2栈缓冲区溢出漏洞

Description

Tapo C520WS v2是一款TP-Link网络摄像机，用于视频监控和ONVIF设备管理。 TP-Link Tapo C520WS v2存在栈缓冲区溢出漏洞。该漏洞产生的原因是ONVIF CreateUsers服务处理XML用户节点数量时缺少有效边界校验。攻击者可利用该漏洞发送包含过多用户条目的ONVIF请求，导致ONVIF管理服务异常终止。

Severity

中

Patch Name

TP-Link Tapo C520WS v2栈缓冲区溢出漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-6239

Impacted products

Name
TP-LINK Tapo C520WS v2

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-6239",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-6239"
    }
  },
  "description": "Tapo C520WS v2\u662f\u4e00\u6b3eTP-Link\u7f51\u7edc\u6444\u50cf\u673a\uff0c\u7528\u4e8e\u89c6\u9891\u76d1\u63a7\u548cONVIF\u8bbe\u5907\u7ba1\u7406\u3002\n\nTP-Link Tapo C520WS v2\u5b58\u5728\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662fONVIF CreateUsers\u670d\u52a1\u5904\u7406XML\u7528\u6237\u8282\u70b9\u6570\u91cf\u65f6\u7f3a\u5c11\u6709\u6548\u8fb9\u754c\u6821\u9a8c\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u53d1\u9001\u5305\u542b\u8fc7\u591a\u7528\u6237\u6761\u76ee\u7684ONVIF\u8bf7\u6c42\uff0c\u5bfc\u81f4ONVIF\u7ba1\u7406\u670d\u52a1\u5f02\u5e38\u7ec8\u6b62\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-30685",
  "openTime": "2026-08-04",
  "patchDescription": "Tapo C520WS v2\u662f\u4e00\u6b3eTP-Link\u7f51\u7edc\u6444\u50cf\u673a\uff0c\u7528\u4e8e\u89c6\u9891\u76d1\u63a7\u548cONVIF\u8bbe\u5907\u7ba1\u7406\u3002\n\nTP-Link Tapo C520WS v2\u5b58\u5728\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662fONVIF CreateUsers\u670d\u52a1\u5904\u7406XML\u7528\u6237\u8282\u70b9\u6570\u91cf\u65f6\u7f3a\u5c11\u6709\u6548\u8fb9\u754c\u6821\u9a8c\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u53d1\u9001\u5305\u542b\u8fc7\u591a\u7528\u6237\u6761\u76ee\u7684ONVIF\u8bf7\u6c42\uff0c\u5bfc\u81f4ONVIF\u7ba1\u7406\u670d\u52a1\u5f02\u5e38\u7ec8\u6b62\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "TP-Link Tapo C520WS v2\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "TP-LINK Tapo C520WS v2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-6239",
  "serverity": "\u4e2d",
  "submitTime": "2026-06-09",
  "title": "TP-Link Tapo C520WS v2\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2026-6239 (GCVE-0-2026-6239)

Vulnerability from cvelistv5 – Published: 2026-06-05 23:50 – Updated: 2026-06-08 13:07

Title

Authenticated Stack-based Buffer Overflow in ONVIF CreateUsers Service in TP-Link Tao C520WS

Summary

A stack‑based buffer overflow vulnerability exists in Tapo C520WS v2 in the ONVIF CreateUsers service, where the device fails to properly validate the number of XML user nodes during request processing. An authenticated attacker can send a specially crafted ONVIF request containing an excessive number of user entries to trigger memory corruption. Successful exploitation may cause the ONVIF management service to terminate unexpectedly, resulting in a denial‑of‑service (DoS) condition that disrupts device configuration and management functions.

Severity

6.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-08 13:07 UTC

CWE

CWE-121 - Stack-based buffer overflow

Assigner

TPLink

References

3 references

URL	Tags
https://www.tp-link.com/us/support/download/tapo-…	patch
https://www.tp-link.com/en/support/download/tapo-…	patch
https://www.tp-link.com/us/support/faq/5120/	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
TP-Link Systems Inc.	Tapo C520WS v2	Affected: 0 , < 1.2.6 Build 260528 (custom)

Show details on NVD website

JSON

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        "metrics": [
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                "id": "CVE-2026-6239",
                "options": [
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                    "Exploitation": "none"
                  },
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                  },
                  {
                    "Technical Impact": "partial"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-08T13:07:25.793532Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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      "metrics": [
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          "url": "https://www.tp-link.com/us/support/faq/5120/"
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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-2026-30685

CVE-2026-6239 (GCVE-0-2026-6239)

Tags

Sightings

Nomenclature