CVE-2026-4902

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The manipulation of the argument page results in stack-based buffer overflow. The attack can be launched remotely. The exploit is now public and may be used."}, {"lang": "es", "value": "Se detect\u00f3 una vulnerabilidad en Tenda AC5 15.03.06.47. Esto afecta a la funci\u00f3n fromAddressNat del archivo /goform/addressNat del componente gestor de solicitudes POST. La manipulaci\u00f3n del argumento page resulta en un desbordamiento de b\u00fafer basado en pila. El ataque puede ser lanzado remotamente. El exploit ya es p\u00fablico y puede ser usado."}], "id": "CVE-2026-4902", "lastModified": "2026-06-17T10:57:25.433", "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-2026-4902", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-27T13:29:19.400294Z", "version": "2.0.3"}}]}, "published": "2026-03-26T23:16:21.090", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://lavender-bicycle-a5a.notion.site/Tenda_AC5_addressNat_page-32053a41781f8017938dda66f0193ebd?source=copy_link"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.353653"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.353653"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.777378"}, {"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": "15.03.06.47"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "AC5", "source": "cna", "vendor": "Tenda"}, "product": "ac5", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-03-31T06:04:12.317119+00:00", "value": {"mitigation_remediation": ["Update the Tenda AC5 firmware to the latest version available on the official Tenda website.", "If a patch is not yet available, disable remote management or block external access to the /goform/addressNat endpoint.", "Verify that the device no longer accepts vulnerable POST requests and monitor network traffic for abnormal activity.", "Apply network segmentation or a firewall to limit inbound traffic to the router."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the Tenda AC5 router, specifically firmware version 15.03.06.47. This build is known to be vulnerable; newer firmware releases may have addressed the issue. Users who have not updated remain exposed to the flaw through the router\u2019s NAT configuration interface.", "description_and_impact": "A stack-based buffer overflow is found in the POST Request Handler of the Tenda AC5 router. The flaw lies in the handling of the \"page\" argument within the fromAddressNat function, allowing a crafted payload sent through the /goform/addressNat endpoint to overflow the stack. Attackers can remotely exploit this to potentially execute arbitrary code or crash the device.", "risk_and_exploitability": "The CVSS score of 8.7 classifies the issue as high severity, while the EPSS score is below 1\u202f%, indicating a low current exploitation probability. The vulnerability is not listed in the CISA KEV catalog, but a public exploit has been released. Attackers can initiate the attack remotely via the WAN interface, making any device exposing the /goform/addressNat POST endpoint to the internet at risk."}}}}, "created": "2026-03-27T08:31:32.948230+00:00", "updated": "2026-03-31T20:01:27.129434+00:00", "vendors": ["tenda", "tenda$PRODUCT$ac5"]}