Overview
CVE-2025-65202 details a critical authenticated remote OS command injection vulnerability found in TRENDnet TEW-657BRM routers running firmware version 1.00.1. This vulnerability resides within the setup.cgi binary. A malicious actor, after successfully authenticating, can leverage specific HTTP parameters to inject and execute arbitrary operating system commands with root privileges. This poses a significant security risk, potentially allowing attackers to completely compromise the affected router and the network it serves.
Technical Details
The vulnerability stems from improper input sanitization within the setup.cgi script. The script utilizes user-supplied data from the HTTP requests without adequate validation, making it susceptible to command injection. Specifically, the command, todo, and next_file HTTP parameters are vulnerable. An authenticated attacker can inject OS commands into these parameters, which are then executed by the system with root privileges. The vulnerable firmware version is 1.00.1.
CVSS Analysis
CVSS score is currently N/A, as it has not yet been determined at the time of writing. However, given the nature of the vulnerability – authenticated remote root command execution – it is highly likely to receive a critical CVSS score upon analysis.
Possible Impact
The successful exploitation of CVE-2025-65202 can have severe consequences:
- Complete Router Compromise: Attackers gain full control of the router with root privileges.
- Data Theft: Sensitive information stored on the router or passing through the network can be stolen.
- Malware Installation: The router can be used as a launching point for spreading malware to other devices on the network.
- Denial of Service (DoS): Attackers can disrupt network services by causing the router to crash or malfunction.
- Network Hijacking: DNS settings can be modified, redirecting users to malicious websites.
- Botnet Recruitment: The compromised router can be added to a botnet for malicious activities.
Mitigation or Patch Steps
Currently, there are no official patches available from TRENDnet for CVE-2025-65202. Here are some recommended mitigation steps:
- Disable Remote Administration: If possible, disable remote administration access to the router to reduce the attack surface.
- Strong Passwords: Ensure that a strong and unique password is used for the router’s administrative interface.
- Network Segmentation: Segment your network to limit the impact of a successful attack.
- Monitor Network Traffic: Monitor network traffic for suspicious activity.
- Consider Router Replacement: If a patch is not released promptly, consider replacing the vulnerable router with a more secure alternative.
- Contact TRENDnet Support: Urge TRENDnet to release a security patch addressing this vulnerability.
