CVE-2021-28152

PoC —

CVSS 3.1

9.8 critical

EPSS

5%p92

Published

May 6, 2021 (May 6, 2021)

Modified

Jun 17, 2026

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.

Vendors: hongdian
Products: h8922 firmware
Weakness: CWE-287
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (5.2%)

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