CVE-2020-36963
Authentication Bypass in Intelbras RF 301K Allows Config Download
Publication date: 2026-01-28
Last updated on: 2026-01-28
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| intelbras | router_rf_301k | 1.1.2 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-306 | The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an authentication bypass in Intelbras Router RF 301K firmware version 1.1.2. It allows unauthenticated attackers to download the router's configuration files by sending a specific HTTP GET request to /cgi-bin/DownloadCfg/RouterCfm.cfg, thereby accessing sensitive router configuration without needing to authenticate.
How can this vulnerability impact me? :
The vulnerability can impact you by allowing attackers to obtain sensitive router configuration files without authentication. This could lead to exposure of network settings, credentials, or other sensitive information, potentially enabling further attacks or unauthorized access to your network.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
You can detect this vulnerability by attempting to access the URL path /cgi-bin/DownloadCfg/RouterCfm.cfg on the Intelbras Router RF 301K device without authentication. For example, using a command like: curl http://<router-ip>/cgi-bin/DownloadCfg/RouterCfm.cfg If the router returns the configuration file without requiring authentication, it is vulnerable.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include restricting external access to the router's management interface, applying any available firmware updates from Intelbras that address this vulnerability, and monitoring network traffic for unauthorized access attempts to /cgi-bin/DownloadCfg/RouterCfm.cfg. If no patch is available, consider isolating the device from untrusted networks.