Vulnerability-Lookup

GHSA-QV33-M6VQ-MQMR

Vulnerability from github – Published: 2026-06-06 00:31 – Updated: 2026-06-06 00:31

Details

Successful exploitation may result in a service crash or deadlock, leading to DoS affecting device management and monitoring functionality.

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-6240"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-06T00:16:41Z",
    "severity": "MODERATE"
  },
  "details": "A stack-based buffer overflow vulnerability exists in Tapo C520WS v2 in the ONVIF DeleteUsers service, due to insufficient boundary checks when handling multiple user deletion parameters. An authenticated attacker can send a  crafted malicious request containing an excessive number of identifiers to overflow stack memory.\n\nSuccessful exploitation may result in a service crash or deadlock, leading to DoS affecting device management and monitoring functionality.",
  "id": "GHSA-qv33-m6vq-mqmr",
  "modified": "2026-06-06T00:31:38Z",
  "published": "2026-06-06T00:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6240"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/us/support/faq/5120"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-6240 (GCVE-0-2026-6240)

Vulnerability from cvelistv5 – Published: 2026-06-05 23:51 – Updated: 2026-06-08 13:08

Title

Authenticated Stack-based Buffer Overflow in ONVIF DeleteUsers Service on TP-Link Tapo C520WS

Summary

A stack-based buffer overflow vulnerability exists in Tapo C520WS v2 in the ONVIF DeleteUsers service, due to insufficient boundary checks when handling multiple user deletion parameters. An authenticated attacker can send a crafted malicious request containing an excessive number of identifiers to overflow stack memory. Successful exploitation may result in a service crash or deadlock, leading to DoS affecting device management and monitoring functionality.

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 mitre root

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)

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-6240",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-08T13:07:55.306567Z",
                "version": "2.0.3"
              },
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            }
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      "metrics": [
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "vulnAvailabilityImpact": "HIGH",
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          "scenarios": [
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          "url": "https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes"
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          "url": "https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes"
        },
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          ],
          "url": "https://www.tp-link.com/us/support/faq/5120/"
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      "source": {
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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.

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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GHSA-QV33-M6VQ-MQMR

CVE-2026-6240 (GCVE-0-2026-6240)

Tags

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Nomenclature

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