CVE-2026-76650 (GCVE-0-2026-76650)
Vulnerability from cvelistv5 – Published: 2026-08-28 20:19 – Updated: 2026-08-31 18:37
VLAI
EPSS
VEX
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:36 UTC
CWE
- CWE-476 - NULL pointer dereference
Assigner
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 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-76650",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-31T18:36:59.443811Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-31T18:37:11.079Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"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": "2026-08-31T18:37:11.079Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-76650",
"date": "2026-09-20",
"epss": "0.00179",
"percentile": "0.0768"
},
"nvd": {
"cve": {
"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": "2026-09-01T20:50:58.753",
"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"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-76650",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-31T18:36:59.443811Z",
"version": "2.0.3"
}
}
]
},
"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": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "f23511db-6c3e-4e32-a477-6aa17d310630",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-76650",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-31T18:36:59.443811Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-31T18:37:06.774Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"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": "2026-08-31T18:37:11.079Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
Loading…
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…