EUVD-2025-4498

Comprehensive Technical Analysis of EUVD-2025-4498

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-4498, also known as CVE-2025-25678, pertains to a buffer overflow in the Tenda i12 V1.0.0.10(3805) firmware. Specifically, the issue resides in the funcpara1 parameter within the formSetCfm function. 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 can be exploited 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 significant breaches of confidentiality.
• Integrity (I): High (H) - The vulnerability allows for significant breaches of integrity.
• Availability (A): High (H) - The vulnerability allows for significant breaches of availability.

Given these metrics, the vulnerability is highly critical and poses a significant risk to affected systems.

2. Potential Attack Vectors and Exploitation Methods

The buffer overflow vulnerability can be exploited through the following methods:

• Remote Code Execution (RCE): An attacker can send specially crafted network packets to the formSetCfm function, causing a buffer overflow. This can lead to arbitrary code execution on the affected device.
• Denial of Service (DoS): By exploiting the buffer overflow, an attacker can crash the device, leading to a denial of service.
• Data Exfiltration: The attacker could potentially extract sensitive information from the device's memory.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Tenda i12 V1.0.0.10(3805) firmware.

Other versions of the Tenda i12 firmware may also be affected, but this has not been confirmed. It is advisable to check for updates and patches from the vendor.

4. Recommended Mitigation Strategies

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

• Firmware Update: Immediately apply any available patches or updates from Tenda.
• Network Segmentation: Isolate affected devices on a separate network segment to limit exposure.
• Firewall Rules: Implement strict firewall rules to restrict access to the device.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity targeting the formSetCfm function.
• Regular Audits: Conduct regular security audits and vulnerability assessments.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations and individuals using the Tenda i12 device. Given the critical nature of the vulnerability, it could be exploited by threat actors to compromise network security, exfiltrate data, or disrupt services. This underscores the importance of timely patch management and proactive security measures within the European cybersecurity landscape.

6. Technical Details for Security Professionals

• Vulnerable Function: formSetCfm
• Vulnerable Parameter: funcpara1
• Exploitation Method: Buffer overflow via specially crafted network packets.
• References:
  • NVD Entry
  • GitHub Analysis

Security professionals should review the provided references for detailed technical analysis and potential exploit code. It is crucial to monitor for any updates from Tenda and other security researchers regarding this vulnerability.

Conclusion

EUVD-2025-4498 is a critical vulnerability affecting the Tenda i12 V1.0.0.10(3805) firmware. Organizations and individuals using this device should prioritize applying patches and implementing robust security measures to mitigate the risk. The European cybersecurity community should remain vigilant and proactive in addressing such vulnerabilities to maintain a secure digital environment.