Overview
CVE-2025-63362 describes a critical vulnerability affecting the Waveshare RS232/485 TO WIFI ETH (B) Serial to Ethernet/Wi-Fi Gateway. Specifically, the firmware version V3.1.1.0 with hardware version HW 4.3.2.1 and webpage version V7.04T.07.002880.0301 allows attackers to set the Administrator password and username to blank values. This effectively bypasses authentication, granting unauthorized access to the device’s configuration and functionalities.
Technical Details
The vulnerability stems from a lack of proper input validation within the web-based administration interface. Attackers can exploit this flaw by submitting requests to the device’s web server that set both the username and password fields to empty strings during the administrator account creation or modification process. The device fails to reject these invalid credentials, resulting in a system that allows login without any authentication. This compromises the security of the entire network segment to which the gateway is connected.
CVSS Analysis
Currently, the CVE record indicates that a CVSS score is not available (N/A). However, based on the nature of the vulnerability (authentication bypass), it would likely receive a high CVSS score if analyzed. Authentication bypass vulnerabilities can lead to complete system compromise, and the lack of required user interaction elevates the risk.
Possible Impact
The impact of CVE-2025-63362 is significant. A successful exploit can allow an attacker to:
- Gain full administrative control over the Waveshare gateway.
- Modify device configuration, potentially disrupting network services.
- Access sensitive data transmitted through the serial ports.
- Use the compromised gateway as a pivot point to attack other devices on the network.
- Potentially inject malicious firmware updates.
Mitigation and Patch Steps
Currently, a patch or firmware update addressing CVE-2025-63362 is not explicitly mentioned in the provided sources. However, immediate mitigation steps should include:
- Isolate the affected device: Place the Waveshare gateway behind a firewall and restrict access to only necessary IP addresses.
- Monitor network traffic: Implement intrusion detection systems to detect any suspicious activity originating from the gateway.
- Contact Waveshare support: Reach out to Waveshare support directly to inquire about a firmware update or patch addressing the vulnerability.
- Disable Remote Access: If possible, disable remote access to the device administration panel and only allow local configuration via a directly connected computer on a secure, isolated network.
- Implement Strong Network Segmentation: Ensure the network segment the device resides on is properly segmented to limit the blast radius of a potential compromise.
Check the Waveshare website regularly for updated firmware or security advisories. Applying the latest available firmware is crucial to mitigating this and other potential vulnerabilities.
