{"id":"CVE-2021-28152","aliases":["EUVD-2021-14850","GHSA-pqm8-v9ww-9q73"],"status":"published","title":"Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell as a...","description":"Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell as a superuser. To connect, the telnet service is used on port 5188 with the default credentials of root:superzxmn.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.05185,"percentile":0.9252,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-798"],"published":"2021-05-06T15:11:59Z","modified":"2026-06-17T03:45:53Z","products":[{"vendor":"hongdian","product":"h8922_firmware"}],"references":[{"url":"http://en.hongdian.com/Products/Details/H8922","tags":["x_refsource_MISC","x_transferred","Product","Vendor Advisory"]},{"url":"https://ssd-disclosure.com/ssd-advisory-hongdian-h8922-multiple-vulnerabilities/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-28152"},{"url":"https://github.com/advisories/GHSA-pqm8-v9ww-9q73"}],"sources":{"cve":[{"id":"CVE-2021-28152","description":"Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell as a superuser. To connect, the telnet service is used on port 5188 with the default credentials of root:superzxmn.","status":"published","published":"2021-05-06T15:11:59Z","modified":"2024-08-03T21:40:12.055Z","updated_at":"2026-11-02T14:33:08.811269Z"}],"euvd":[{"id":"EUVD-2021-14850","description":"Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell as a superuser. To connect, the telnet service is used on port 5188 with the default credentials of root:superzxmn.","status":"published","published":"2021-05-06T15:11:59Z","modified":"2024-08-03T21:40:12Z","updated_at":"2026-11-03T03:24:47.350261Z"}],"ghsa":[{"id":"GHSA-pqm8-v9ww-9q73","title":"Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell as a...","description":"Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell as a superuser. To connect, the telnet service is used on port 5188 with the default credentials of root:superzxmn.","status":"published","published":"2022-05-24T19:01:28Z","modified":"2023-08-17T05:01:46Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-798"],"updated_at":"2026-11-02T14:54:45.250925Z"}],"nvd":[{"id":"CVE-2021-28152","description":"Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell as a superuser. To connect, the telnet service is used on port 5188 with the default credentials of root:superzxmn.","status":"published","published":"2021-05-06T16:15:07.417Z","modified":"2026-06-17T03:45:53.34Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:06:52.81233Z"}]}}