CVE-2021-28152

CriticalCVSS 9.8/10Last 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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-287

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://en.hongdian.com/Products/Details/H8922Product, Vendor Advisory
https://ssd-disclosure.com/ssd-advisory-hongdian-h8922-multiple-vulnerabilities/Exploit, Third Party Advisory
http://en.hongdian.com/Products/Details/H8922Product, Vendor Advisory
https://ssd-disclosure.com/ssd-advisory-hongdian-h8922-multiple-vulnerabilities/Exploit, Third Party Advisory

Timeline

Published: May 6, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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