CVE-2026-3799

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The exploit has been published and may be used."}, {"lang": "es", "value": "Se ha encontrado una vulnerabilidad en Tenda i3 1.0.0.6(2204). Esto afecta a la funci\u00f3n formSetCfm del archivo /goform/setcfm. Esta manipulaci\u00f3n del argumento funcpara1 causa desbordamiento de b\u00fafer basado en pila. La explotaci\u00f3n remota del ataque es posible. El exploit ha sido publicado y puede ser utilizado."}], "id": "CVE-2026-3799", "lastModified": "2026-06-17T10:44:15.000", "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-2026-3799", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-10T16:07:54.976351Z", "version": "2.0.3"}}]}, "published": "2026-03-09T04:16:04.720", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-i3-setcfm-funcpara1-buffer-overflow"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.349766"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.349766"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.768976"}, {"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": "2026-04-16T10:23:00.265568+00:00", "value": {"mitigation_remediation": ["Upgrade the router firmware to a version that patches the formSetCfm stack-based overflow, as released by Tenda.", "If a firmware update is not yet available, restrict external access to the device by placing it behind a firewall or network segmentation and disabling remote web management.", "Monitor device logs and network traffic for abnormal requests to /goform/setcfm and block known malicious payloads using intrusion detection or packet filtering."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerable system is the Tenda i3 router running firmware version 1.0.0.6(2204). All units shipping with this firmware are affected; no other firmware versions are listed as impacted.", "description_and_impact": "A stack-based buffer overflow exists in the formSetCfm endpoint of Tenda i3 firmware 1.0.0.6(2204). By supplying a crafted funcpara1 argument to the /goform/setcfm route, a remote attacker can overflow the stack and gain arbitrary code execution on the device, impacting confidentiality, integrity, and availability. The flaw receives a CVSS score of 8.7.", "risk_and_exploitability": "The EPSS score is below 1\u202f% and the vulnerability is not listed in CISA\u2019s KEV catalog, yet an exploit has been published and remote exploitation is possible. Attackers can trigger the overflow by sending a crafted HTTP request to /goform/setcfm from outside the local network, indicating the attack vector is remote over the Internet. Despite the low exploitation probability, the high impact score makes the risk significant."}}}}, "created": "2026-03-10T14:10:25.650048+00:00", "updated": "2026-04-16T10:30:16.171558+00:00", "vendors": ["tenda", "tenda$PRODUCT$i3"]}