{"id":"CVE-2021-21728","aliases":["EUVD-2021-8900","GHSA-3386-9355-8xp9"],"status":"published","title":"A ZTE product has a configuration error vulnerability. Because a certain port is open by default,...","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.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00991,"percentile":0.62847,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2021-04-09T17:23:32Z","modified":"2026-06-17T03:36:03Z","products":[{"vendor":"zte","product":"zxa10_c300m_firmware"}],"references":[{"url":"https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014784","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21728"},{"url":"https://github.com/advisories/GHSA-3386-9355-8xp9"}],"sources":{"cve":[{"id":"CVE-2021-21728","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.","status":"published","published":"2021-04-09T17:23:32Z","modified":"2024-08-03T18:23:29.029Z","updated_at":"2026-11-02T14:33:00.137099Z"}],"euvd":[{"id":"EUVD-2021-8900","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.","status":"published","published":"2021-04-09T17:23:32Z","modified":"2024-08-03T18:23:29Z","updated_at":"2026-11-03T03:25:05.131984Z"}],"ghsa":[{"id":"GHSA-3386-9355-8xp9","title":"A ZTE product has a configuration error vulnerability. Because a certain port is open by default,...","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.","status":"published","published":"2022-05-24T17:46:58Z","modified":"2023-01-29T05:06:17Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:45:59.496932Z"}],"nvd":[{"id":"CVE-2021-21728","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.","status":"published","published":"2021-04-09T18:15:13.833Z","modified":"2026-06-17T03:36:03.04Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:06:51.610648Z"}]}}