CVE-2021-28152
9.8
CRITICAL · CVSS 3.1 · EPSS 5.2% (pctl 92)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 5.19% — more likely to be exploited than 92% of all CVEs |
| Weakness | CWE-287 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-05-06 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| hongdian | h8922 |
| hongdian | h8922 firmware |
References
→ the Explorer · watch your stack · NVD