CVE-2026-3804

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{"affected": [{"affectedData": [{"product": "i3", "vendor": "Tenda", "versions": [{"status": "affected", "version": "1.0.0.6(2204)"}]}], "source": "cna@vuldb.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:tenda:i3_firmware:1.0.0.6\\(2204\\):*:*:*:*:*:*:*", "matchCriteriaId": "70DC8153-3B2F-4369-B01A-DF0C4804AFA5", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:tenda:i3:-:*:*:*:*:*:*:*", "matchCriteriaId": "50D0C1A4-AA5F-426A-B82C-00D1CEFE20FC", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in Tenda i3 1.0.0.6(2204). This vulnerability affects the function formWifiMacFilterSet of the file /goform/WifiMacFilterSet. The manipulation of the argument index results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks."}, {"lang": "es", "value": "Una falla de seguridad ha sido descubierta en Tenda i3 1.0.0.6(2204). Esta vulnerabilidad afecta la funci\u00f3n formWifiMacFilterSet del archivo /goform/WifiMacFilterSet. La manipulaci\u00f3n del argumento index resulta en desbordamiento de b\u00fafer basado en pila. Es posible lanzar el ataque remotamente. El exploit ha sido publicado y puede ser utilizado para ataques."}], "id": "CVE-2026-3804", "lastModified": "2026-06-17T10:44:15.680", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "COMPLETE", "baseScore": 9.0, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "cna@vuldb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/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": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3804", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-10T15:48:29.350518Z", "version": "2.0.3"}}]}, "published": "2026-03-09T06:16:09.070", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-i3-formWifiMacFilterSet-index-buffer-overflow"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.349771"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.349771"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.768985"}, {"source": "cna@vuldb.com", "tags": ["Product"], "url": "https://www.tenda.com.cn/"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-121"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "1.0.0.6(2204)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "i3", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-04-16T10:20:50.153962+00:00", "value": {"mitigation_remediation": ["Install any vendor\u2011released firmware update that addresses the stack overflow, if available.", "If no patch is yet released, disable the formWifiMacFilterSet interface or the Wi\u2011Fi MAC filter function to prevent the vulnerable code from being invoked.", "Restrict remote management of the device by placing it behind a firewall that blocks external access to the /goform/WifiMacFilterSet endpoint.", "Monitor device logs and network traffic for anomalous activity that might indicate exploitation attempts."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "Tenda i3, firmware version 1.0.0.6(2204).", "description_and_impact": "A stack\u2011based buffer overflow exists in the formWifiMacFilterSet function of Tenda i3 firmware 1.0.0.6(2204). By manipulating the index argument supplied to /goform/WifiMacFilterSet, an attacker can overflow the device\u2019s stack and potentially execute arbitrary code. The flaw is exploitable remotely, and public exploit code has already been released. Consequently, an adversary could compromise the device\u2019s network functions, leading to data loss, service disruption, or further lateral movement.", "risk_and_exploitability": "The CVSS score is 8.7, indicating high severity. EPSS is below 1%, suggesting a low probability of exploitation, and the vulnerability is not listed in CISA\u2019s KEV catalog. Despite this, the exploit is publicly available and can be launched remotely, allowing attackers to gain control of the device by exploiting the stack overflow and bypassing normal authentication constraints."}}}}, "created": "2026-03-10T14:10:18.390792+00:00", "updated": "2026-04-16T10:30:16.168979+00:00", "vendors": ["tenda", "tenda$PRODUCT$i3"]}