Read the docs
TI-2021-09380 Aliases CVE-2021-28149GHSA-mcvc-q5xw-3pf6

Hongdian H8922 3.0.5 devices allow Directory Traversal.

Priority MEDIUM 45CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.1592 96th percentileScored 2026-11-08
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:hongdian:h8922_firmware:3.0.5:*:*:*:*:*:*:*3.0.5VulnerableHongdian
cpe:2.3:h:hongdian:h8922:-:*:*:*:*:*:*:*not specified by NVDRunning onHongdian
  • cpe:2.3:o:hongdian:h8922_firmware:3.0.5:*:*:*:*:*:*:* Versions 3.0.5 Vulnerable ·Hongdian
  • cpe:2.3:h:hongdian:h8922:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Hongdian

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-28149
  2. 2026-10-03 Alias added: GHSA-mcvc-q5xw-3pf6

References

Exploit 1

Advisory 1

  • TI-2021-09382 Hongdian H8922 3.0.5 devices allow OS command injection via shell metacharacters into the… CVSS 3.1HIGH 8.8
  • TI-2021-09383 Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell… CVSS 3.1CRITICAL 9.8
  • TI-2021-09381 Hongdian H8922 3.0.5 devices allow the unprivileged guest user to read cli.conf (with the… CVSS 3.1MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences