EUVD-2025-8017

Comprehensive Technical Analysis of EUVD-2025-8017

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-8017, also known as CVE-2025-29135, is a stack-based buffer overflow in Tenda AC7 V15.03.06.44. This vulnerability allows a remote attacker to execute arbitrary code through a stack overflow attack using the security parameter of the formWifiBasicSet function. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The scoring vector 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 over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Privileges Required (PR): None (N) - No privileges are required to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - Complete loss of confidentiality.
• Integrity (I): High (H) - Complete loss of integrity.
• Availability (A): High (H) - Complete loss of availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is through network-based exploitation. An attacker can send a specially crafted request to the formWifiBasicSet function, causing a stack overflow. This overflow can be leveraged to execute arbitrary code on the affected device. Potential exploitation methods include:

• Remote Code Execution (RCE): By crafting a malicious payload that overflows the stack buffer, an attacker can inject and execute arbitrary code.
• Denial of Service (DoS): The stack overflow can also be used to crash the device, leading to a denial of service.

3. Affected Systems and Software Versions

The vulnerability specifically affects Tenda AC7 devices running firmware version V15.03.06.44. It is crucial to identify all instances of this device within the network and ensure they are updated to a patched version as soon as it becomes available.

4. Recommended Mitigation Strategies

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

• Firmware Update: Immediately apply any available firmware updates from Tenda that address this vulnerability.
• Network Segmentation: Isolate IoT devices, including Tenda AC7, from critical network segments to limit the potential impact of an attack.
• Firewall Rules: Implement strict firewall rules to restrict access to the device from untrusted networks.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity that may indicate an exploitation attempt.
• 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 risk to the European cybersecurity landscape, particularly in environments where Tenda AC7 devices are widely deployed. The potential for remote code execution and denial of service attacks can lead to severe disruptions in network operations, data breaches, and loss of service availability. Organizations and individuals using these devices should prioritize mitigation efforts to protect against potential attacks.

6. Technical Details for Security Professionals

• Vulnerability Type: Stack-based buffer overflow.
• Affected Function: formWifiBasicSet
• Exploitation Method: Crafting a malicious request to overflow the stack buffer.
• References:
  • GitHub Repository
  • Gist
  • NVD Entry

Security professionals should review the provided references for detailed technical information and proof-of-concept exploits. This will aid in understanding the specifics of the vulnerability and developing targeted mitigation strategies.

Conclusion

EUVD-2025-8017 represents a critical vulnerability that requires immediate attention from cybersecurity professionals. By understanding the technical details, potential attack vectors, and recommended mitigation strategies, organizations can effectively protect their networks and devices from exploitation. Regular updates, network segmentation, and proactive monitoring are essential components of a robust security posture in the face of such threats.