CVE-2021-28149

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 15.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-05-06 · updated 2026-06-17
Weakness: CWE-22

Description

Hongdian H8922 3.0.5 devices allow Directory Traversal. The /log_download.cgi log export handler does not validate user input and allows a remote attacker with minimal privileges to download any file from the device by substituting ../ (e.g., ../../etc/passwd) This can be carried out with a web browser by changing the file name accordingly. Upon visiting log_download.cgi?type=../../etc/passwd and logging in, the web server will allow a download of the contents of the /etc/passwd file.

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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