EUVD-2025-4504

Comprehensive Technical Analysis of EUVD-2025-4504

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-4504 affects the Tenda AC10 V1.0 router, specifically in version V15.03.06.23. The issue is a buffer overflow in the form_fast_setting_wifi_set function via the ssid parameter. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

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

2. Potential Attack Vectors and Exploitation Methods

The buffer overflow vulnerability in the ssid parameter can be exploited by sending a specially crafted request to the router's web interface. An attacker could:

• Send a Malicious HTTP Request: Craft an HTTP request with an overly long ssid value to trigger the buffer overflow.
• Execute Arbitrary Code: If the buffer overflow is not properly mitigated, it could lead to arbitrary code execution on the router.
• Denial of Service (DoS): The buffer overflow could crash the router, leading to a denial of service.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Tenda AC10 V1.0
• Firmware Version: V15.03.06.23

Other versions of the Tenda AC10 router may also be affected, but this has not been confirmed. Users should verify the firmware version and apply updates as necessary.

4. Recommended Mitigation Strategies

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

• Update Firmware: Immediately update the router firmware to the latest version provided by Tenda.
• Network Segmentation: Isolate the router from critical network segments to limit potential damage.
• Firewall Rules: Implement strict firewall rules to restrict access to the router's web interface.
• Monitoring: Enable logging and monitoring to detect any suspicious activity targeting the router.
• Disable Remote Management: If not necessary, disable remote management features to reduce the attack surface.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European users and organizations relying on Tenda AC10 routers. Given the critical nature of the vulnerability, it could be exploited to compromise network security, leading to data breaches, unauthorized access, and service disruptions. The widespread use of such routers in homes and small businesses amplifies the potential impact.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerable Function: form_fast_setting_wifi_set
• Vulnerable Parameter: ssid
• Exploitation Method: Craft an HTTP request with an overly long ssid value to trigger the buffer overflow.
• References:
  • NVD Entry
  • GitHub Analysis

Security professionals should review the provided references for detailed exploitation techniques and mitigation strategies. Regularly updating firmware and implementing robust network security measures are crucial to protecting against such vulnerabilities.

Conclusion

EUVD-2025-4504 represents a critical vulnerability in the Tenda AC10 V1.0 router. Immediate action is required to update the firmware and implement additional security measures to mitigate the risk. The potential for remote exploitation and high impact on confidentiality, integrity, and availability underscores the urgency of addressing this issue.