CVE-2021-28152

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 96%
VendorProductVersion
hongdianh8922_firmware
3.0.5
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
http://en.hongdian.com/Products/Details/H8922
https://ssd-disclosure.com/ssd-advisory-hongdian-h8922-multiple-vulnerabilities/
http://en.hongdian.com/Products/Details/H8922
https://ssd-disclosure.com/ssd-advisory-hongdian-h8922-multiple-vulnerabilities/