{"affected":[{"affectedData":[{"product":"<ZXHN F623>","vendor":"n/a","versions":[{"status":"affected","version":"<ZXHN Z500 V1.0.0.2B1.1000 & ZXHN F670L V1.1.10P1N2E>"}]}],"source":"psirt@zte.com.cn"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:zte:zxhn_f623_firmware:*:*:*:*:*:*:*:*","matchCriteriaId":"9CB260C1-1CE3-4016-8C9E-117DA72A9DF6","versionEndExcluding":"6.0.0p3t34","vulnerable":true}],"negate":false,"operator":"OR"},{"cpeMatch":[{"criteria":"cpe:2.3:h:zte:zxhn_f623:-:*:*:*:*:*:*:*","matchCriteriaId":"6746E033-5814-4D1A-869A-371ECA32323F","vulnerable":false}],"negate":false,"operator":"OR"}],"operator":"AND"}],"cveTags":[],"descriptions":[{"lang":"en","value":"A ZTE product has a DoS vulnerability. A remote attacker can amplify traffic by sending carefully constructed IPv6 packets to the affected devices, which eventually leads to device denial of service. This affects:<ZXHN F623><All versions up to V6.0.0P3T33>"},{"lang":"es","value":"Un producto ZTE presenta una vulnerabilidad de DoS.&#xa0;Un atacante remoto puede amplificar el tráfico mediante el envío de paquetes IPv6 cuidadosamente construidos hacia los dispositivos afectados, lo que eventualmente conlleva a una denegación de servicio del dispositivo.&#xa0;Esto afecta a: (ZXHN F623) (Todas las versiones hasta V6.0.0P3T33)"}],"id":"CVE-2021-21727","lastModified":"2026-06-17T03:36:02.940","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"HIGH","cvssData":{"accessComplexity":"LOW","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"COMPLETE","baseScore":7.8,"confidentialityImpact":"NONE","integrityImpact":"NONE","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:C","version":"2.0"},"exploitabilityScore":10.0,"impactScore":6.9,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV31":[{"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":"nvd@nist.gov","type":"Primary"}]},"published":"2021-03-29T16:15:13.133","references":[{"source":"psirt@zte.com.cn","tags":["Vendor Advisory"],"url":"https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014744"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"url":"https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014744"}],"sourceIdentifier":"psirt@zte.com.cn","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"NVD-CWE-noinfo"}],"source":"nvd@nist.gov","type":"Primary"}]}