{"id":"CVE-2020-6881","aliases":["EUVD-2020-28023","GHSA-f6c6-g5xq-fvm6"],"status":"published","title":"ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the...","description":"ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages. A remote attacker could connect to the MQTT server and send an MQTT exception message to the specified device, which will cause the device to deny service. This affects:\u003cZXHN E8810, ZXHN E8820, ZXHN E8822\u003e\u003cE8810 V1.0.26, E8810 V2.0.1, E8820 V1.1.3L, E8820 V2.0.13, E8822 V2.0.13\u003e","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00587,"percentile":0.48538,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-346"],"published":"2020-12-21T17:18:21Z","modified":"2026-06-17T03:23:58Z","products":[{"vendor":"zte","product":"zxhn_e8810_firmware"},{"vendor":"zte","product":"zxhn_e8820_firmware"},{"vendor":"zte","product":"zxhn_e8822_firmware"}],"references":[{"url":"http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014202","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-6881"},{"url":"https://github.com/advisories/GHSA-f6c6-g5xq-fvm6"}],"sources":{"cve":[{"id":"CVE-2020-6881","description":"ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages. A remote attacker could connect to the MQTT server and send an MQTT exception message to the specified device, which will cause the device to deny service. This affects:\u003cZXHN E8810, ZXHN E8820, ZXHN E8822\u003e\u003cE8810 V1.0.26, E8810 V2.0.1, E8820 V1.1.3L, E8820 V2.0.13, E8822 V2.0.13\u003e","status":"published","published":"2020-12-21T17:18:21Z","modified":"2024-08-04T09:18:01.465Z","updated_at":"2026-11-02T14:35:52.592504Z"}],"euvd":[{"id":"EUVD-2020-28023","description":"ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages. A remote attacker could connect to the MQTT server and send an MQTT exception message to the specified device, which will cause the device to deny service. This affects:\u003cZXHN E8810, ZXHN E8820, ZXHN E8822\u003e\u003cE8810 V1.0.26, E8810 V2.0.1, E8820 V1.1.3L, E8820 V2.0.13, E8822 V2.0.13\u003e","status":"published","published":"2020-12-21T17:18:21Z","modified":"2024-08-04T09:18:01Z","updated_at":"2026-11-03T03:08:01.566283Z"}],"ghsa":[{"id":"GHSA-f6c6-g5xq-fvm6","title":"ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the...","description":"ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages. A remote attacker could connect to the MQTT server and send an MQTT exception message to the specified device, which will cause the device to deny service. This affects:\u003cZXHN E8810, ZXHN E8820, ZXHN E8822\u003e\u003cE8810 V1.0.26, E8810 V2.0.1, E8820 V1.1.3L, E8820 V2.0.13, E8822 V2.0.13\u003e","status":"published","published":"2022-05-24T17:37:12Z","modified":"2023-01-29T05:05:49Z","cwes":["CWE-346"],"updated_at":"2026-11-02T14:45:52.819939Z"}],"nvd":[{"id":"CVE-2020-6881","description":"ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages. A remote attacker could connect to the MQTT server and send an MQTT exception message to the specified device, which will cause the device to deny service. This affects:\u003cZXHN E8810, ZXHN E8820, ZXHN E8822\u003e\u003cE8810 V1.0.26, E8810 V2.0.1, E8820 V1.1.3L, E8820 V2.0.13, E8822 V2.0.13\u003e","status":"published","published":"2020-12-21T18:15:16.713Z","modified":"2026-06-17T03:23:58.233Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","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-346"],"updated_at":"2026-11-02T14:06:27.73474Z"}]}}