Vulnerability-Lookup

CVE-2026-76650 (GCVE-0-2026-76650)

Vulnerability from cvelistv5 – Published: 2026-08-28 20:19 – Updated: 2026-08-28 20:19

Title

Pre-Authentication NULL Pointer Dereference in UPnP SOAP State Variable Query Processing in TP-Link TL-WR841N

Summary

A NULL pointer dereference vulnerability exists in TL-WR841N v14 in the UPnP service when processing SOAP state variable query requests. A specially crafted SOAP query may trigger unexpected termination or instability of the process hosting the UPnP service. Successful exploitation may result in a denial-of-service condition affecting UPnP discovery, state query, or related management functionality until the affected process is restarted or the device is rebooted.

Severity

5.3 (Medium)


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

CWE

CWE-476 - NULL pointer dereference

Assigner

TPLink mitre root

References

3 references

URL	Tags
https://www.tp-link.com/us/support/download/tl-wr…	patch
https://www.tp-link.com/en/support/download/tl-wr…	patch
https://www.tp-link.com/us/support/faq/5270/	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
TP-Link System Inc.	TL-WR841N v14	Affected: 0 , < TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478 (custom) Affected: 0 , < TL-WR841N(EU)_V14_4.19 Build 260821 Rel.56588 (custom)	guessed

Credits

Jincheng Wang (@winmt) from Nanjing University of Posts and Telecommunications

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "TL-WR841N v14",
          "vendor": "TP-Link System Inc.",
          "versions": [
            {
              "lessThan": "TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "lessThan": "TL-WR841N(EU)_V14_4.19 Build 260821 Rel.56588",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Jincheng Wang (@winmt) from Nanjing University of Posts and Telecommunications"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003e\u003cspan\u003eA NULL\npointer dereference vulnerability exists in\u0026nbsp;\u003c/span\u003e\u003cspan\u003eTL-WR841N v14\u003c/span\u003e\u003cspan\u003e\u0026nbsp;in\u003c/span\u003e\u003cspan\u003e\u0026nbsp;the UPnP service when processing\nSOAP state variable query requests. A specially crafted SOAP query may trigger\nunexpected termination or instability of the process hosting the UPnP service.\u003c/span\u003e\u003c/p\u003e\u003cdiv\u003e\n\n\u003cp\u003eSuccessful\nexploitation may result in a denial-of-service condition affecting UPnP\ndiscovery, state query, or related management functionality until the affected\nprocess is restarted or the device is rebooted.\u003c/p\u003e\u003c/div\u003e"
            }
          ],
          "value": "A NULL\npointer dereference vulnerability exists in\u00a0TL-WR841N v14\u00a0in\u00a0the UPnP service when processing\nSOAP state variable query requests. A specially crafted SOAP query may trigger\nunexpected termination or instability of the process hosting the UPnP service.\n\n\n\n\n\nSuccessful\nexploitation may result in a denial-of-service condition affecting UPnP\ndiscovery, state query, or related management functionality until the affected\nprocess is restarted or the device is rebooted."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-153",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-153 Input Data Manipulation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "ADJACENT",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476 NULL pointer dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-28T20:19:03.475Z",
        "orgId": "f23511db-6c3e-4e32-a477-6aa17d310630",
        "shortName": "TPLink"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.tp-link.com/us/support/faq/5270/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Pre-Authentication NULL Pointer Dereference in UPnP SOAP State Variable Query Processing in TP-Link TL-WR841N",
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f23511db-6c3e-4e32-a477-6aa17d310630",
    "assignerShortName": "TPLink",
    "cveId": "CVE-2026-76650",
    "datePublished": "2026-08-28T20:19:03.475Z",
    "dateReserved": "2026-08-19T15:49:30.548Z",
    "dateUpdated": "2026-08-28T20:19:03.475Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-76650\",\"sourceIdentifier\":\"f23511db-6c3e-4e32-a477-6aa17d310630\",\"published\":\"2026-08-28T22:16:53.380\",\"lastModified\":\"2026-08-28T22:16:53.380\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A NULL\\npointer dereference vulnerability exists in\u00a0TL-WR841N v14\u00a0in\u00a0the UPnP service when processing\\nSOAP state variable query requests. A specially crafted SOAP query may trigger\\nunexpected termination or instability of the process hosting the UPnP service.\\n\\n\\n\\n\\n\\nSuccessful\\nexploitation may result in a denial-of-service condition affecting UPnP\\ndiscovery, state query, or related management functionality until the affected\\nprocess is restarted or the device is rebooted.\"}],\"affected\":[{\"source\":\"f23511db-6c3e-4e32-a477-6aa17d310630\",\"affectedData\":[{\"vendor\":\"TP-Link System Inc.\",\"product\":\"TL-WR841N v14\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"TL-WR841N(EU)_V14_4.19 Build 260821 Rel.56588\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"f23511db-6c3e-4e32-a477-6aa17d310630\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"ADJACENT\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"LOW\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"f23511db-6c3e-4e32-a477-6aa17d310630\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"references\":[{\"url\":\"https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware\",\"source\":\"f23511db-6c3e-4e32-a477-6aa17d310630\"},{\"url\":\"https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware\",\"source\":\"f23511db-6c3e-4e32-a477-6aa17d310630\"},{\"url\":\"https://www.tp-link.com/us/support/faq/5270/\",\"source\":\"f23511db-6c3e-4e32-a477-6aa17d310630\"}]}}"
  }
}

FKIE_CVE-2026-76650

Vulnerability from fkie_nvd - Published: 2026-08-28 22:16 - Updated: 2026-08-28 22:16

Severity

5.3 (Medium) - CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	f23511db-6c3e-4e32-a477-6aa17d310630	https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware
	f23511db-6c3e-4e32-a477-6aa17d310630	https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware
	f23511db-6c3e-4e32-a477-6aa17d310630	https://www.tp-link.com/us/support/faq/5270/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "TL-WR841N v14",
          "vendor": "TP-Link System Inc.",
          "versions": [
            {
              "lessThan": "TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "lessThan": "TL-WR841N(EU)_V14_4.19 Build 260821 Rel.56588",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A NULL\npointer dereference vulnerability exists in\u00a0TL-WR841N v14\u00a0in\u00a0the UPnP service when processing\nSOAP state variable query requests. A specially crafted SOAP query may trigger\nunexpected termination or instability of the process hosting the UPnP service.\n\n\n\n\n\nSuccessful\nexploitation may result in a denial-of-service condition affecting UPnP\ndiscovery, state query, or related management functionality until the affected\nprocess is restarted or the device is rebooted."
    }
  ],
  "id": "CVE-2026-76650",
  "lastModified": "2026-08-28T22:16:53.380",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "ADJACENT",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-28T22:16:53.380",
  "references": [
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "url": "https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware"
    },
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "url": "https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware"
    },
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "url": "https://www.tp-link.com/us/support/faq/5270/"
    }
  ],
  "sourceIdentifier": "f23511db-6c3e-4e32-a477-6aa17d310630",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "type": "Secondary"
    }
  ]
}

GHSA-WG9W-9V33-74XX

Vulnerability from github – Published: 2026-08-29 00:31 – Updated: 2026-08-29 00:31

Details

Successful exploitation may result in a denial-of-service condition affecting UPnP discovery, state query, or related management functionality until the affected process is restarted or the device is rebooted.

Severity

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-76650"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T22:16:53Z",
    "severity": "MODERATE"
  },
  "details": "A NULL\npointer dereference vulnerability exists in\u00a0TL-WR841N v14\u00a0in\u00a0the UPnP service when processing\nSOAP state variable query requests. A specially crafted SOAP query may trigger\nunexpected termination or instability of the process hosting the UPnP service.\n\n\n\n\n\nSuccessful\nexploitation may result in a denial-of-service condition affecting UPnP\ndiscovery, state query, or related management functionality until the affected\nprocess is restarted or the device is rebooted.",
  "id": "GHSA-wg9w-9v33-74xx",
  "modified": "2026-08-29T00:31:03Z",
  "published": "2026-08-29T00:31:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76650"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/us/support/faq/5270"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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"
    }
  ]
}

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

CVE-2026-76650 (GCVE-0-2026-76650)

FKIE_CVE-2026-76650

GHSA-WG9W-9V33-74XX

Tags

Sightings

Nomenclature