CVE-2021-28152

CRITICAL EXPLOITED

Hongdian H8922 3.0.5 - Privilege Escalation

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2021-28152 has been observed exploited in the wild (reported by VulnCheck KEV).

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.

References (2)

Core 2
Core References
Product, Vendor Advisory x_refsource_misc
http://en.hongdian.com/Products/Details/H8922

Scores

CVSS v3 9.8
EPSS 0.0519
EPSS Percentile 91.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

VulnCheck KEV 2021-10-07
CWE
CWE-287
Status published
Products (1)
hongdian/h8922_firmware 3.0.5
Published May 06, 2021
Tracked Since Feb 18, 2026