EUVD-2025-6101

Comprehensive Technical Analysis of EUVD-2025-6101

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-6101 affects Tenda AC15 v15.03.05.19, specifically through a Command Injection flaw in the handler function within the /goform/telnet endpoint. The CVSS (Common Vulnerability Scoring System) Base Score of 9.8 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• AV:N (Attack Vector: Network): The vulnerability can be exploited remotely over the network.
• AC:L (Attack Complexity: Low): The attack requires minimal skill or resources to exploit.
• PR:N (Privileges Required: None): No privileges are required to exploit the vulnerability.
• UI:N (User Interaction: None): No user interaction is required for the attack to succeed.
• S:U (Scope: Unchanged): The vulnerability does not change the security scope.
• C:H (Confidentiality: High): The vulnerability allows for high impact on confidentiality.
• I:H (Integrity: High): The vulnerability allows for high impact on integrity.
• A:H (Availability: High): The vulnerability allows for high impact on availability.

Given these metrics, the vulnerability poses a significant risk to the confidentiality, integrity, and availability of affected systems.

2. Potential Attack Vectors and Exploitation Methods

The Command Injection vulnerability can be exploited through the following methods:

• Remote Command Execution: An attacker can send specially crafted HTTP requests to the /goform/telnet endpoint, injecting malicious commands that the system will execute with the privileges of the web server.
• Data Exfiltration: By injecting commands, an attacker can extract sensitive information from the device, such as configuration files, user credentials, and network data.
• Denial of Service (DoS): An attacker can inject commands that disrupt the normal operation of the device, leading to a denial of service.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Tenda AC15 v15.03.05.19: This version of the Tenda AC15 router is confirmed to be vulnerable. Other versions may also be affected but have not been explicitly mentioned in the EUVD entry.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Patch Management: Ensure that the Tenda AC15 firmware is updated to the latest version that addresses this vulnerability. Regularly check for and apply security patches.
• Network Segmentation: Isolate the affected devices on a separate network segment to limit the potential impact of an exploit.
• Access Control: Implement strict access controls to limit who can access the device's management interface. Use strong, unique passwords and consider implementing multi-factor authentication (MFA).
• Intrusion Detection/Prevention Systems (IDPS): Deploy IDPS to monitor network traffic for suspicious activity and block potential exploitation attempts.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address potential security issues.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant threat to the European cybersecurity landscape, particularly for organizations and individuals using Tenda AC15 routers. The potential for remote command execution, data exfiltration, and denial of service can lead to:

• Data Breaches: Sensitive information can be stolen, leading to financial loss and reputational damage.
• Service Disruptions: Critical services can be disrupted, affecting business operations and user experience.
• Compliance Issues: Organizations may face compliance issues with regulations such as GDPR if sensitive data is compromised.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Exploit Code: The vulnerability can be exploited by sending a crafted HTTP request to the /goform/telnet endpoint. For example:

  POST /goform/telnet HTTP/1.1
  Host: <target_ip>
  Content-Type: application/x-www-form-urlencoded
  
  cmd=<malicious_command>
  

• Detection: Monitor network traffic for unusual patterns, such as unexpected outbound connections or high volumes of traffic to the /goform/telnet endpoint.
• Logging: Ensure that logging is enabled on the device to capture any suspicious activity. Regularly review logs for signs of exploitation.
• Incident Response: Develop an incident response plan that includes steps for identifying, containing, and remediating the vulnerability.

Conclusion

EUVD-2025-6101 represents a critical vulnerability in Tenda AC15 v15.03.05.19 that requires immediate attention. Organizations and individuals using this device should prioritize updating to a patched version and implement robust security measures to mitigate the risk of exploitation. The potential impact on the European cybersecurity landscape underscores the importance of proactive security management and regular vulnerability assessments.

References

• GitHub Repository
• NVD Entry