{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-14T08:44:35.133","vulnerabilities":[{"cve":{"id":"CVE-2021-21281","sourceIdentifier":"security-advisories@github.com","published":"2021-06-18T21:15:07.850","lastModified":"2024-11-21T05:47:55.470","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Contiki-NG is an open-source, cross-platform operating system for internet of things devices. A buffer overflow vulnerability exists in Contiki-NG versions prior to 4.6. After establishing a TCP socket using the tcp-socket library, it is possible for the remote end to send a packet with a data offset that is unvalidated. The problem has been patched in Contiki-NG 4.6. Users can apply the patch for this vulnerability out-of-band as a workaround."},{"lang":"es","value":"Contiki-NG es un sistema operativo de código abierto y multiplataforma para dispositivos del Internet de las cosas. Se presenta una vulnerabilidad de desbordamiento de búfer en las versiones de Contiki-NG anteriores a 4.6. Después de haber establecido un socket TCP usando la biblioteca tcp-socket, es posible para el extremo remoto enviar un paquete con un desplazamiento de datos que no está validado. El problema ha sido parcheado en Contiki-NG versión 4.6. Los usuarios pueden aplicar el parche para esta vulnerabilidad fuera de límite como solución alternativa"}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H","baseScore":7.0,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":4.7},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"HIGH","exploitabilityScore":10.0,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-120"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:contiki-ng:contiki-ng:*:*:*:*:*:*:*:*","versionEndExcluding":"4.6","matchCriteriaId":"5A252509-8FE0-4C3D-9628-2041425B3F05"}]}]}],"references":[{"url":"https://github.com/contiki-ng/contiki-ng/pull/1366","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-mc42-fqfr-h9fp","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/contiki-ng/contiki-ng/pull/1366","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-mc42-fqfr-h9fp","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]}]}}]}