{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-24112", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-03-03T20:09:05.330Z", "dateReserved": "2026-01-21T00:00:00.000Z", "datePublished": "2026-03-02T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-03-02T15:22:43.587Z"}, "descriptions": [{"lang": "en", "value": "An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may exploit the vulnerability by specifying the value of `userInfo`. When `userInfo` is passed into the `addWewifiWhiteUser` function and processed by `sscanf` without size validation, it could lead to a buffer overflow vulnerability."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://www.tenda.com.cn/material/show/2707"}, {"url": "https://github.com/akuma-QAQ/CVEreport/tree/main/D-link/CVE-2026-24112"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-120", "lang": "en", "description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-03-03T20:08:36.261216Z", "id": "CVE-2026-24112", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-03T20:09:05.330Z"}}]}, "dataVersion": "5.2"}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:tenda:w20e_firmware:15.11.0.6:*:*:*:*:*:*:*", "matchCriteriaId": "31C1283D-8DCF-49C0-92FF-34CF842D00BF", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:tenda:w20e:4.0:*:*:*:*:*:*:*", "matchCriteriaId": "A09E3911-CF3F-4C15-8EF9-5AA8EEA0FC21", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may exploit the vulnerability by specifying the value of `userInfo`. When `userInfo` is passed into the `addWewifiWhiteUser` function and processed by `sscanf` without size validation, it could lead to a buffer overflow vulnerability."}], "id": "CVE-2026-24112", "lastModified": "2026-03-03T20:16:47.360", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-03-02T16:16:24.680", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/akuma-QAQ/CVEreport/tree/main/D-link/CVE-2026-24112"}, {"source": "cve@mitre.org", "tags": ["Product"], "url": "https://www.tenda.com.cn/material/show/2707"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-120"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-120"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "15.11.0.6"}}], "enrichment": {"confidence": 85.0, "confidence_source": "inferred", "scores": [{"score": 85.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "w20e", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-04-18T17:32:37.871925+00:00", "value": {"mitigation_remediation": ["Apply the latest available Tenda W20E firmware that includes a fix for the addWewifiWhiteUser buffer overflow.", "If no firmware update is available, block or restrict traffic to the router\u2019s management interface, for example by disabling remote administration or limiting access to a trusted IP range.", "Implement strict input validation on the userInfo field before it reaches sscanf, ensuring the string length never exceeds the buffer size.", "Employ network segmentation or a firewall to isolate the router from external networks, reducing exposure of the vulnerable interface."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The flaw affects all Tenda W20E routers running firmware 4.0br V15.11.0.6.", "description_and_impact": "The vulnerability is a classic buffer overflow (CWE\u2011120) in the addWewifiWhiteUser function of the Tenda W20E router. When a crafted userInfo string is processed by sscanf without size validation, the buffer is overflowed, corrupting adjacent memory. This can lead to arbitrary code execution or a denial\u2011of\u2011service condition on the device.", "risk_and_exploitability": "The likely attack vector is remote via the router\u2019s management interface that accepts the userInfo parameter, most plausibly a web or API endpoint. The CVSS score of 7.5 indicates high severity, while the EPSS score of less than 1% suggests that publicly documented exploitation is currently unlikely. The vulnerability is not listed in the CISA KEV catalog. An attacker does not need local or physical access; proximity to the device is therefore not required. Successful exploitation could grant code execution or force the router to reboot."}}}}, "created": "2026-03-03T08:46:53.241617+00:00", "title": "Buffer Overflow in Tenda W20E Router Firmware 4.0br V15.11.0.6", "updated": "2026-04-18T17:45:06.047786+00:00", "vendors": ["tenda", "tenda$PRODUCT$w20e"]}