CVE-2026-24110

{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-24110", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-03-02T16:07:39.459Z", "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": "2026-03-02T15:26:22.341Z"}, "descriptions": [{"lang": "en", "value": "An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may send overly long `addDhcpRules` data. When these rules enter the `addDhcpRule` function and are processed by `ret = sscanf(pRule, \" %d\\t%[^\\t]\\t%[^\\n\\r\\t]\", &dhcpsIndex, dhcpsIP, dhcpsMac);`, the lack of size validation for the rules could lead to buffer overflows in `dhcpsIndex`, `dhcpsIP`, and `dhcpsMac`."}], "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-2026-24110"}], "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": 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": "2026-03-02T16:06:01.336928Z", "id": "CVE-2026-24110", "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": "2026-03-02T16:07:39.459Z"}}]}, "dataVersion": "5.2"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "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": {"id": "CVE-2026-24110", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-03-02T16:06:01.336928Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-120", "description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-02T16:07:08.101Z"}}], "cna": {"affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "references": [{"url": "https://www.tenda.com.cn/material/show/2707"}, {"url": "https://github.com/akuma-QAQ/CVEreport/tree/main/D-link/CVE-2026-24110"}], "descriptions": [{"lang": "en", "value": "An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may send overly long `addDhcpRules` data. When these rules enter the `addDhcpRule` function and are processed by `ret = sscanf(pRule, \" %d\\t%[^\\t]\\t%[^\\n\\r\\t]\", &dhcpsIndex, dhcpsIP, dhcpsMac);`, the lack of size validation for the rules could lead to buffer overflows in `dhcpsIndex`, `dhcpsIP`, and `dhcpsMac`."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "text", "description": "n/a"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-03-02T15:26:22.341Z"}}}, "cveMetadata": {"cveId": "CVE-2026-24110", "state": "PUBLISHED", "dateUpdated": "2026-03-02T16:07:39.459Z", "dateReserved": "2026-01-21T00:00:00.000Z", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "datePublished": "2026-03-02T00:00:00.000Z", "assignerShortName": "mitre"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "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 send overly long `addDhcpRules` data. When these rules enter the `addDhcpRule` function and are processed by `ret = sscanf(pRule, \" %d\\t%[^\\t]\\t%[^\\n\\r\\t]\", &dhcpsIndex, dhcpsIP, dhcpsMac);`, the lack of size validation for the rules could lead to buffer overflows in `dhcpsIndex`, `dhcpsIP`, and `dhcpsMac`."}, {"lang": "es", "value": "Se descubri\u00f3 un problema en Tenda W20E V4.0br_V15.11.0.6. Los atacantes pueden enviar datos 'addDhcpRules' excesivamente largos. Cuando estas reglas entran en la funci\u00f3n 'addDhcpRule' y son procesadas por 'ret = sscanf(pRule, \" %d\\t%[^\\t]\\t%[^\\n\\r\\t]\", &dhcpsIndex, dhcpsIP, dhcpsMac);', la falta de validaci\u00f3n del tama\u00f1o de las reglas podr\u00eda provocar desbordamientos de b\u00fafer en 'dhcpsIndex', 'dhcpsIP' y 'dhcpsMac'."}], "id": "CVE-2026-24110", "lastModified": "2026-06-17T10:22:38.410", "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-24110", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-02T16:06:01.336928Z", "version": "2.0.3"}}]}, "published": "2026-03-02T16:16:24.547", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/akuma-QAQ/CVEreport/tree/main/D-link/CVE-2026-24110"}, {"source": "cve@mitre.org", "tags": ["Product"], "url": "https://www.tenda.com.cn/material/show/2707"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Analyzed", "weaknesses": [{"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": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "w20e", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-04-16T14:44:41.831349+00:00", "value": {"mitigation_remediation": ["Upgrade the router to the latest available firmware that contains the buffer\u2011overflow fix.", "If an update is not available, block or disable the addDhcpRules API on the device or the network segment that contains management traffic.", "As an interim safeguard, apply input size validation to the DHCP rule processing or segregate the management interface to trusted networks only."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution via buffer overflow in DHCP rule processing"}, "threat_synthesis": {"affected_systems": "The flaw affects Tenda W20E routers running firmware version 4.0br_V15.11.0.6 (firmware build 15.11.0.6). Any device that exposes the addDhcpRules interface and is reachable from the network is subject to this issue.", "description_and_impact": "The vulnerability resides in the addDhcpRules handler of Tenda W20E V4.0br_V15.11.0.6 firmware. An attacker can transmit data that exceeds the expected length, and because the sscanf call does not enforce bounds on dhcpsIndex, dhcpsIP and dhcpsMac, a buffer overflow occurs. This memory corruption can allow arbitrary code execution or a denial\u2011of\u2011service condition, consistent with CWE\u2011120.", "risk_and_exploitability": "With a CVSS score of 9.8 the vulnerability is rated critical. The EPSS score is below 1\u202f%, indicating that, as of the data set, exploitation is unlikely. It is not currently listed in the CISA KEV catalog, so there are no documented exploits. The likely attack vector is remote, originating from the network interface that accepts DHCP rule submissions, potentially without authentication."}}}}, "created": "2026-03-03T08:46:57.389405+00:00", "title": "Buffer Overflow via Overly Long addDhcpRules Input in Tenda W20E Firmware", "updated": "2026-04-16T14:45:25.983011+00:00", "vendors": ["tenda", "tenda$PRODUCT$w20e"]}