EUVD-2025-11011

Comprehensive Technical Analysis of EUVD-2025-11011

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-11011 affects the Tenda AC10 V4.0si_V16.03.10.20 router, specifically in the AdvSetMacMtuWan function via the mac2 parameter. This vulnerability is classified as a Buffer Overflow, which is a critical type of security flaw. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a high 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 (Network Vector): The vulnerability is exploitable over the network.
• AC:L (Low Complexity): The attack requires low skill or resources.
• PR:N (No Privileges Required): No privileges are needed to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required.
• S:U (Unchanged): The scope of the vulnerability does not change.
• C:H (High Confidentiality Impact): There is a high impact on confidentiality.
• I:H (High Integrity Impact): There is a high impact on integrity.
• A:H (High Availability Impact): There is a high impact on availability.

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

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector for this vulnerability is through network-based exploitation. An attacker could send specially crafted packets to the AdvSetMacMtuWan function, causing a buffer overflow. This could lead to:

• Remote Code Execution (RCE): The attacker could execute arbitrary code on the affected device.
• Denial of Service (DoS): The attacker could crash the device, rendering it unavailable.
• Data Exfiltration: The attacker could potentially extract sensitive information from the device.

Exploitation methods could include:

• Crafted Network Packets: Sending malformed packets to the router to trigger the buffer overflow.
• Automated Scripts: Using scripts to automate the exploitation process, making it easier to target multiple devices.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Tenda AC10 V4.0si_V16.03.10.20: This version of the Tenda AC10 router is confirmed to be vulnerable.

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

4. Recommended Mitigation Strategies

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

• Firmware Update: Apply the latest firmware update from Tenda as soon as it becomes available.
• Network Segmentation: Isolate the router from critical networks to limit the potential impact of an exploit.
• Firewall Rules: Implement strict firewall rules to block unauthorized access to the router.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity.
• Regular Audits: Conduct regular security audits to identify and address vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European cybersecurity, particularly for organizations and individuals using the affected Tenda AC10 router. The potential for remote code execution and data exfiltration could lead to:

• Data Breaches: Sensitive information could be compromised.
• Service Disruptions: Critical services could be disrupted, affecting business operations.
• Compliance Issues: Organizations may face compliance issues if they fail to address the vulnerability promptly.

6. Technical Details for Security Professionals

For security professionals, the following technical details are essential:

• Vulnerable Function: AdvSetMacMtuWan
• Vulnerable Parameter: mac2
• Exploitation Method: Buffer Overflow via crafted network packets
• References:
  • GitHub Repository
  • Gist
  • NVD Entry

Security professionals should review these references for detailed information on the vulnerability and potential exploitation methods. Additionally, they should monitor for updates from Tenda and other security advisories to stay informed about any new developments related to this vulnerability.

Conclusion

The vulnerability EUVD-2025-11011 in the Tenda AC10 router is critical and requires immediate attention. Organizations and individuals should prioritize updating their firmware and implementing robust security measures to mitigate the risk. Continuous monitoring and regular security audits are essential to maintain a strong cybersecurity posture.