{"id":"CVE-2021-21728","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-21728","generatedAt":"2026-10-28T01:51:32.269Z","title":"A ZTE product has a configuration error vulnerability.","description":"A ZTE product has a configuration error vulnerability. Because a certain port is open by default, an attacker can consume system processing resources by flushing a large number of packets to the port, and successfully exploiting this vulnerability could reduce system processing capabilities. This affects: ZXA10 C300M all versions up to V4.3P8.","published":"2021-04-09T18:15:14.000Z","lastModified":"2026-06-17T03:36:03.000Z","status":"Modified","sourceIdentifier":"psirt@zte.com.cn","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"cwe":["CWE-400"],"affected":["zte/zxa10 c300m firmware"],"epss":{"score":0.00957,"percentile":0.61212,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.96%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014784","tags":["Vendor Advisory"],"source":"psirt@zte.com.cn"},{"url":"https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014784","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-21728","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}