CVE-2026-34122

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An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow.\n\nSuccessful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability."}, {"lang": "es", "value": "Una vulnerabilidad de desbordamiento de b\u00fafer basado en pila fue identificada en TP-Link Tapo C520WS v2.6 dentro de un componente de manejo de configuraci\u00f3n debido a una validaci\u00f3n de entrada insuficiente. Un atacante puede explotar esta vulnerabilidad al proporcionar un valor excesivamente largo para un par\u00e1metro de configuraci\u00f3n vulnerable, lo que resulta en un desbordamiento de pila.\n\nLa explotaci\u00f3n exitosa resulta en una condici\u00f3n de Denegaci\u00f3n de Servicio (DoS), lo que lleva a una ca\u00edda del servicio o reinicio del dispositivo, afectando la disponibilidad."}], "id": "CVE-2026-34122", "lastModified": "2026-07-24T21:10:00.143", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "ADJACENT", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "baseSeverity": "HIGH", "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: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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "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-2026-34122", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-02T17:59:26.902945Z", "version": "2.0.3"}}]}, "published": "2026-04-02T18:16:29.150", "references": [{"source": "f23511db-6c3e-4e32-a477-6aa17d310630", "tags": ["Release Notes"], "url": "https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes"}, {"source": "f23511db-6c3e-4e32-a477-6aa17d310630", "tags": ["Release Notes"], "url": "https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes"}, {"source": "f23511db-6c3e-4e32-a477-6aa17d310630", "tags": ["Vendor Advisory"], "url": "https://www.tp-link.com/us/support/faq/5047/"}], "sourceIdentifier": "f23511db-6c3e-4e32-a477-6aa17d310630", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "f23511db-6c3e-4e32-a477-6aa17d310630", "type": "Secondary"}]}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.2.4 Build 260326 Rel.24666n)"}}], "enrichment": {"confidence": 81.0, "confidence_source": "matching", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 81.0, "source": "matching"}]}, "original": {"product": "Tapo C520WS v2.6", "source": "cna", "vendor": "TP-Link Systems Inc."}, "product": "tapo_c520ws_v2", "vendor": "tp-link"}], "analysis": {"en": {"generated_at": "2026-04-07T01:49:28.480422+00:00", "value": {"mitigation_remediation": ["Apply the latest firmware update from TP-Link that addresses the stack-based buffer overflow vulnerability.", "If a firmware update is not available, limit access to the device\u2019s configuration interface by disabling remote management or segmenting the network.", "Monitor the device for unexpected reboots or crashes which may indicate exploitation attempts.", "If the device continues to be vulnerable, consider performing a factory reset and reconfiguring it with secure network settings.", "Ensure that all management protocols are protected with appropriate authentication and are not exposed to untrusted networks."], "summary": {"action": "Apply Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The affected system is the TP-Link Tapo C520WS camera running firmware version 2.6. No other versions or models are listed as impacted in the CNA data.", "description_and_impact": "A stack-based buffer overflow has been identified in the configuration handling component of the TP-Link Tapo C520WS firmware version 2.6. The vulnerability arises because the firmware does not properly validate the length of a configuration parameter supplied by an operator. When an unusually long value is provided, the input overflows the stack, causing the device\u2019s management service to crash or the device itself to reboot. The failure mode is an availability loss, with no direct compromise of data confidentiality or integrity. This weakness is categorized as CWE-121.", "risk_and_exploitability": "The vulnerability carries a CVSS score of 7.1, indicating moderate severity, and an EPSS score of less than 1%, suggesting a low likelihood of exploitation in the wild. It is not listed in the CISA KEV catalog. The likely attack vector is remote, via the device\u2019s web or management interface, where an attacker can submit the oversized configuration value without needing local access. Successful exploitation results in service crashes or device restarts, causing downtime for any applications relying on continuous camera operation."}}}}, "created": "2026-04-03T08:58:08.345903+00:00", "updated": "2026-04-07T07:55:47.076482+00:00", "vendors": ["tp-link", "tp-link$PRODUCT$tapo_c520ws_v2"]}