{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-5685", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-04-06T10:14:10.085Z", "datePublished": "2026-04-06T21:30:16.732Z", "dateUpdated": "2026-04-06T21:30:16.732Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-04-06T21:30:16.732Z"}, "title": "Tenda CX12L addressNat fromAddressNat stack-based overflow", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-121", "lang": "en", "description": "Stack-based Buffer Overflow"}]}, {"descriptions": [{"type": "CWE", "cweId": "CWE-119", "lang": "en", "description": "Memory Corruption"}]}], "affected": [{"vendor": "Tenda", "product": "CX12L", "versions": [{"version": "16.03.53.12", "status": "affected"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability was identified in Tenda CX12L 16.03.53.12. This affects the function fromAddressNat of the file /goform/addressNat. The manipulation of the argument page leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might be used."}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 8.7, "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", "baseSeverity": "HIGH"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 8.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R", "baseSeverity": "HIGH"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 8.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R", "baseSeverity": "HIGH"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 9, "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR"}}], "timeline": [{"time": "2026-04-06T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-04-06T02:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-04-06T12:19:24.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "lv1020 (VulDB User)", "type": "reporter"}], "references": [{"url": "https://vuldb.com/vuln/355512", "name": "VDB-355512 | Tenda CX12L addressNat fromAddressNat stack-based overflow", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/vuln/355512/cti", "name": "VDB-355512 | CTI Indicators (IOB, IOC, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/submit/792782", "name": "Submit #792782 | Tenda CX12L V16.03.53.12 Stack-based Buffer Overflow", "tags": ["third-party-advisory"]}, {"url": "https://github.com/cve-a/lvdan/issues/3", "tags": ["exploit", "issue-tracking"]}, {"url": "https://www.tenda.com.cn/", "tags": ["product"]}]}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was identified in Tenda CX12L 16.03.53.12. This affects the function fromAddressNat of the file /goform/addressNat. The manipulation of the argument page leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might be used."}], "id": "CVE-2026-5685", "lastModified": "2026-04-06T22:16:24.690", "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": "Primary"}], "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"}]}, "published": "2026-04-06T22:16:24.690", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/cve-a/lvdan/issues/3"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/792782"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/355512"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/355512/cti"}, {"source": "cna@vuldb.com", "url": "https://www.tenda.com.cn/"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-121"}], "source": "cna@vuldb.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[16.03.53.12,16.03.53.12]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "cx12l", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-04-07T01:59:57.224093+00:00", "value": {"mitigation_remediation": ["Update the router firmware to the latest version released by Tenda", "If an official patch is not available, disable remote management interfaces or restrict access to trusted IPs", "Ensure that default credentials have been changed and enforce strong password policies", "Apply network segmentation or firewall rules to block unnecessary ports used by the vulnerable service", "Regularly monitor logs for anomalous activity related to the addressNat function"], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The affected product is the Tenda CX12L wireless router running firmware version 16.03.53.12. No other versions are explicitly listed; users of this specific build are at risk.", "description_and_impact": "A stack-based buffer overflow exists in the fromAddressNat function of Tenda CX12L firmware 16.03.53.12. By manipulating the page argument, an attacker can overwrite memory on the stack, potentially enabling arbitrary code execution on the device. The flaw is triggered through a remote request, and the public exploit raises the risk of a full system compromise. The vulnerability is classified as CWE\u2011119 and CWE\u2011121.", "risk_and_exploitability": "The CVSS score of 8.7 indicates a high severity, and the lack of an EPSS rating does not diminish the fact that the exploit is publicly available and can be triggered remotely. While the vulnerability is not currently in the CISA KEV catalog, its remote nature and confirmed exploit code make it a likely target for adversaries. The high score, remote attack vector, and public exploit suggest that the risk is significant and should be addressed promptly."}}}}, "created": "2026-04-07T06:53:53.939087+00:00", "updated": "2026-04-07T09:36:52.136833+00:00", "vendors": ["tenda", "tenda$PRODUCT$cx12l"]}