What is CVE-2021-28150?

CVE-2021-28150 is a medium-severity vulnerability in Hongdian H8922, classified under Direct Request (Forced Browsing). CVSS score: 5.5/10. Published 2021-05-06.

How severe is CVE-2021-28150?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-28150 known to be exploited?

13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Hongdian H8922

CVE-2021-28150

Hongdian H8922 3.0.5 devices allow the unprivileged guest user to read cli.conf (with the administrator password and other sensitive data) via /backup2.cgi.

Published 2021-05-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.028 (85.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000

Affected products

Hongdian H8922
Hongdian H8922 Firmware — versions 3.0.5

Weakness classification (CWE)

CWE-425 — Direct Request (Forced Browsing)

Public proof-of-concept exploits

References

en.hongdian.com/Products/Details/H8922 (Product, Vendor Advisory)
ssd-disclosure.com/ssd-advisory-hongdian-h8922-multiple-vulnerabilities/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-28150?: CVE-2021-28150 is a medium-severity vulnerability in Hongdian H8922, classified under Direct Request (Forced Browsing). CVSS score: 5.5/10. Published 2021-05-06.
How severe is CVE-2021-28150?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-28150 known to be exploited?: 13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.