{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-24111", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-03-05T15:56:42.518Z", "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": "2026-03-02T14:58:20.081Z"}, "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 `addAuthUser` function and processed by `sscanf` without size validation, it could lead to buffer overflow."}], "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-2026-24111"}], "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')"}]}], "references": [{"url": "https://github.com/akuma-QAQ/CVEreport/tree/main/D-link/CVE-2026-24111", "tags": ["exploit"]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-03-05T15:56:37.354869Z", "id": "CVE-2026-24111", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-05T15:56:42.518Z"}}]}, "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 `addAuthUser` function and processed by `sscanf` without size validation, it could lead to buffer overflow."}], "id": "CVE-2026-24111", "lastModified": "2026-03-05T16:16:15.497", "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": 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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-03-02T15:16:33.497", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/akuma-QAQ/CVEreport/tree/main/D-link/CVE-2026-24111"}, {"source": "cve@mitre.org", "tags": ["Product"], "url": "https://www.tenda.com.cn/material/show/2707"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/akuma-QAQ/CVEreport/tree/main/D-link/CVE-2026-24111"}], "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": "V4.0br_V15.11.0.6"}}], "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": "2026-04-18T10:11:20.088498+00:00", "value": {"mitigation_remediation": ["Apply an updated firmware that fixes the unchecked sscanf usage.", "If a patch is unavailable, disable or block the vulnerable management endpoint to prevent malicious input.", "Segment the device or place it behind a firewall to reduce exposure and monitor traffic for suspicious activity."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "Affected systems are the Tenda W20E router with firmware V4.0br_V15.11.0.6 and firmware 15.11.0.6; no other vendors are listed as impacted.", "description_and_impact": "An input validation flaw in Tenda W20E\u2019s addAuthUser function allows a buffer overflow when the supplied userInfo string is processed by sscanf without length checks. The overflow can corrupt adjacent memory, giving an attacker the potential to execute arbitrary code, elevate privileges, or crash the device. The weakness is identified as CWE\u2011120.", "risk_and_exploitability": "The vulnerability scores a CVSS of 9.8, indicating critical severity. The EPSS probability is less than 1\u202f% and the flaw is not yet listed in the CISA KEV catalog. The likely attack vector is sending a crafted userInfo parameter to the router\u2019s HTTP management interface, which causes the unchecked sscanf call to overflow the buffer. Security teams should treat this as a high\u2011risk threat and prioritize remediation accordingly."}}}}, "created": "2026-03-03T08:46:48.786419+00:00", "updated": "2026-04-18T10:15:25.877386+00:00", "vendors": ["tenda", "tenda$PRODUCT$w20e"]}