CVE-2021-28149 (GCVE-0-2021-28149)

Vulnerability from cvelistv5 – Published: 2021-05-06 15:12 – Updated: 2024-08-03 21:40
VLAI Shadowserver
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2326 records in the last 180 days details
References
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 69e04253-a45e-4792-b209-f51184c95223

Vulnerability ID: CVE-2021-28149

Status: Confirmed

Status Updated: 2026-09-06 00:00 UTC

Exploited: Yes

Characteristics
Severity: 65.0
Timestamps
First Seen: 2023-10-23
Asserted: 2023-10-23
Last Seen: 2026-09-06
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Hongdian / Hongdian H8922 | Class: router | Severity: Medium (CVSS 6.5) | IoT: yes | In CISA KEV: no | Honeypot connections on 2026-09-06: 1
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 1
Iot yes
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class router
7D Avg 1
Vendor Hongdian
30D Avg 0
90D Avg 0
Product Hongdian H8922
Cisa Kev no
Connections 1
Observation Date 2026-09-06
Vulnerability Class CVSS
Vulnerability Score 6.5
Vulnerability Severity Medium
References
Created: 2026-07-01 05:54 UTC | Updated: 2026-09-08 01:02 UTC
Show details on NVD website
To clipboard 

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