CVE-2026-5350

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:o:trendnet:tew-657brm_firmware:*:*:*:*:*:*:*:*"], "product": "TEW-657BRM", "vendor": "Trendnet", "versions": [{"status": "affected", "version": "1.00.1"}]}], "source": "cna@vuldb.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:trendnet:tew-657brm_firmware:1.00.1:*:*:*:*:*:*:*", "matchCriteriaId": "1BE1CB11-EC54-4B31-AD1C-CE00DD8CFAA7", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:trendnet:tew-657brm:-:*:*:*:*:*:*:*", "matchCriteriaId": "9CE54282-3202-477F-B965-3AF302F5DEC7", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [{"sourceIdentifier": "cna@vuldb.com", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in Trendnet TEW-657BRM 1.00.1. The impacted element is the function update_pcdb of the file /setup.cgi. The manipulation of the argument mac_pc_dba results in stack-based buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The vendor confirms, that \"[t]he product in question (...) has been discontinued and end of life since June 23, 2011, that is more than 14 years ago. We no longer provide support for this product, so we are not able to confirm the vulnerabilities. We will make an announcement on our website's product support page and notify customers who registered their products with us.\" This vulnerability only affects products that are no longer supported by the maintainer."}, {"lang": "es", "value": "Se ha descubierto una falla de seguridad en Trendnet TEW-657BRM 1.00.1. El elemento afectado es la funci\u00f3n update_pcdb del archivo /setup.cgi. La manipulaci\u00f3n del argumento mac_pc_dba resulta en un desbordamiento de b\u00fafer basado en pila. El ataque puede ser lanzado remotamente. El exploit ha sido liberado al p\u00fablico y puede ser usado para ataques. El fabricante confirma que 'El producto en cuesti\u00f3n (...) ha sido descontinuado y ha llegado al fin de su vida \u00fatil desde el 23 de junio de 2011, es decir, hace m\u00e1s de 14 a\u00f1os. Ya no ofrecemos soporte para este producto, por lo que no podemos confirmar las vulnerabilidades. Haremos un anuncio en la p\u00e1gina de soporte de productos de nuestro sitio web y notificaremos a los clientes que registraron sus productos con nosotros.' Esta vulnerabilidad solo afecta a productos que ya no cuentan con soporte por parte del mantenedor."}], "id": "CVE-2026-5350", "lastModified": "2026-07-24T20:10:00.147", "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-2026-5350", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-02T16:05:22.968735Z", "version": "2.0.3"}}]}, "published": "2026-04-02T16:16:27.863", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/panda666-888/vuls/blob/main/trendnet/tew-657brm/update_pcdb.md"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/submit/781567"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/vuln/354703"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/vuln/354703/cti"}], "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": "semver", "value": "1.00.1"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "TEW-657BRM", "source": "cna", "vendor": "Trendnet"}, "product": "tew-657brm", "vendor": "trendnet"}], "analysis": {"en": {"generated_at": "2026-04-07T23:32:50.703245+00:00", "value": {"mitigation_remediation": ["Disable remote web management of the Trendnet TEW-657BRM.", "Block external network access to the device by placing it in a separate VLAN or applying firewall rules.", "Replace the discontinued router with a supported, VPN\u2011enabled model.", "Monitor network logs for suspicious activity targeting the router."], "summary": {"action": "Disable Remote Access", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The flaw affects only Trendnet TEW-657BRM routers running firmware version 1.00.1. These units were discontinued and have been out of support since June\u202f23\u202f2011, meaning the vendor no longer provides updates or confirmation of the issue.", "description_and_impact": "A stack-based buffer overflow exists in the update_pcdb function of the setup.cgi script on Trendnet TEW-657BRM routers. By sending a specially crafted mac_pc_dba argument, an attacker can overflow a stack buffer and potentially execute arbitrary code on the device. The vulnerability is exploitable remotely; the exploit has been publicly released, so anyone with network access to the device may target it.", "risk_and_exploitability": "The CVSS score of 8.7 indicates a high severity level, while the EPSS score of less than 1% suggests a low likelihood of widespread exploitation. The vulnerability is not listed in the CISA KEV catalog. Attackers can reach the vulnerable endpoint over the network, though the lack of vendor support limits official mitigations and increases the importance of network isolation or device replacement."}}}}, "created": "2026-04-02T20:11:28.457327+00:00", "updated": "2026-04-08T19:55:37.296214+00:00", "vendors": ["trendnet", "trendnet$PRODUCT$tew-657brm"]}