CVE-2026-4974

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Executing a manipulation of the argument Time can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used."}, {"lang": "es", "value": "Se ha encontrado una falla en Tenda AC7 15.03.06.44. Afectada por este problema est\u00e1 la funci\u00f3n fromSetSysTime del archivo /goform/SetSysTimeCfg del componente Gestor de Solicitudes POST. Ejecutar una manipulaci\u00f3n del argumento Time puede llevar a un desbordamiento de b\u00fafer basado en pila. Es posible lanzar el ataque de forma remota. El exploit ha sido publicado y puede ser utilizado."}], "id": "CVE-2026-4974", "lastModified": "2026-10-26T21:10:00.170", "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-2026-4974", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-31T13:54:02.284294Z", "version": "2.0.3"}}]}, "published": "2026-03-27T20:16:38.473", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://lavender-bicycle-a5a.notion.site/Tenda-AC7-fromSetSysTime-32153a41781f801c95b0f8a53eaa9a1f?source=copy_link"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.353861"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.353861"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.778207"}, {"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"}, {"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "15.03.06.44"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "AC7", "source": "cna", "vendor": "Tenda"}, "product": "ac7", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-03-30T20:27:09.145176+00:00", "value": {"mitigation_remediation": ["Apply the official firmware update that addresses the buffer overflow (or upgrade to a later firmware version).", "Verify the integrity of the new firmware before applying it.", "If an update is not yet available, block or restrict access to the /goform/SetSysTimeCfg endpoint via firewall rules or router access controls."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution via stack-based buffer overflow triggered by a manipulated POST request"}, "threat_synthesis": {"affected_systems": "Tenda AC7 routers running firmware version 15.03.06.44 are affected. The flaw resides in the router\u2019s web\u2011based configuration interface, which is exposed on the local network and, if reachable from the internet, can be contacted remotely.", "description_and_impact": "A stack-based buffer overflow exists in the function that processes POST requests to the SetSysTimeCfg endpoint. By sending a crafted Time argument, an attacker can corrupt the stack, potentially leading to arbitrary code execution or a denial\u2011of\u2011service condition. The vulnerability is rated CVSS 8.7, indicating a high severity.", "risk_and_exploitability": "The EPSS score indicates a very low probability of exploitation, and the vulnerability is not listed in CISA\u2019s KEV catalog. Nonetheless, the attack vector is remote over the network through a standard HTTP POST request to /goform/SetSysTimeCfg, and exploit code has been published. The combination of a high CVSS score and low EPSS suggests a moderate overall risk that warrants prompt mitigation."}}}}, "created": "2026-03-29T20:30:18.225325+00:00", "updated": "2026-03-30T20:57:01.459884+00:00", "vendors": ["tenda", "tenda$PRODUCT$ac7"]}