What’s Vulnerable › Vulnerabilities

CVE-2021-28152

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-06 · updated 2026-06-17
• Weakness: CWE-287

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.

Affected products

• Hongdian H8922 Firmware: 3.0.5

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/

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