CVE-2026-3677

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The exploit has been made public and could be used."}, {"lang": "es", "value": "Una vulnerabilidad fue encontrada en Tenda FH451 1.0.0.9. Esto afecta la funci\u00f3n fromSetCfm del archivo /goform/setcfm. La manipulaci\u00f3n del argumento funcname/funcpara1 resulta en desbordamiento de b\u00fafer basado en pila. El ataque puede ser realizado desde remoto. El exploit ha sido hecho p\u00fablico y podr\u00eda ser usado."}], "id": "CVE-2026-3677", "lastModified": "2026-06-17T10:43:59.687", "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-2026-3677", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-11T16:25:47.536252Z", "version": "2.0.3"}}]}, "published": "2026-03-07T22:15:50.770", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/Litengzheng/vul_db/blob/main/FH451/vul_61/README.md"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.349579"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.349579"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.765329"}, {"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": "1.0.0.9"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "FH451", "source": "cna", "vendor": "Tenda"}, "product": "fh451", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-04-16T04:30:26.158667+00:00", "value": {"mitigation_remediation": ["Upgrade the router firmware to a patched version that resolves the fromSetCfm overflow flaw.", "Restrict network access to the device\u2019s management interface using firewall rules or VLAN segmentation, limiting connections to trusted internal hosts.", "If the setcfm endpoint is not required for normal operation, disable or block access to it to remove the attack surface.", "Monitor the device for unusual activity and apply future vendor updates as they become available."], "summary": {"action": "Immediate Patch", "impact": "Remote Buffer Overflow potentially enabling code execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Tenda FH451 routers running firmware version 1.0.0.9. No other versions have been confirmed to be impacted at this time.", "description_and_impact": "A stack-based buffer overflow exists in the fromSetCfm function of the Tenda FH451 firmware 1.0.0.9, triggered by manipulating the funcname/funcpara1 arguments in the /goform/setcfm interface. The flaw permits a remote attacker to corrupt the stack, leading to uncontrolled behavior that could allow arbitrary code execution, thereby compromising device confidentiality, integrity, and availability. This vulnerability is classified as CWE-119 and CWE-121.", "risk_and_exploitability": "The CVSS score of 8.7 indicates a high severity, while the EPSS score of less than 1% suggests a low current likelihood of exploitation. The flaw can be triggered remotely via the web interface, but the exploit requires sending a crafted payload to the setcfm endpoint. The vulnerability is not listed in CISA\u2019s KEV catalog."}}}}, "created": "2026-03-09T10:03:52.954492+00:00", "updated": "2026-04-16T04:45:16.113268+00:00", "vendors": ["tenda", "tenda$PRODUCT$fh451"]}