EUVD-2025-204956

Comprehensive Technical Analysis of EUVD-2025-204956

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-204956 affects the Tenda WH450 router, specifically version 1.0.0.18. The issue resides in the HTTP Request Handler component, particularly in the file /goform/PPTPDClient. The vulnerability is a stack-based buffer overflow that can be triggered by manipulating the Username argument. This vulnerability is severe, with a CVSS base score of 9.3, indicating a critical risk.

CVSS Vector Breakdown:

• AV:N (Network Vector): The vulnerability can be exploited remotely over the network.
• AC:L (Low Complexity): The attack requires low skill or resources to exploit.
• AT:N (No Authentication): No authentication is required to exploit the vulnerability.
• PR:N (No Privileges Required): No special privileges are needed.
• UI:N (No User Interaction): No user interaction is required.
• VC:H (High Confidentiality Impact): Successful exploitation can lead to significant data breaches.
• VI:H (High Integrity Impact): The integrity of the system can be compromised.
• VA:H (High Availability Impact): The availability of the system can be severely impacted.
• SC:N (No Change in Scope): The vulnerability does not change the security scope.
• SI:N (No Change in Impact): The impact remains within the security scope.
• SA:N (No Change in Authorization): The authorization scope remains unchanged.
• E:P (Proof of Concept Exists): There is a publicly available exploit.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is remote exploitation via network access. An attacker can send a specially crafted HTTP request to the vulnerable component, manipulating the Username argument to cause a stack-based buffer overflow. This can lead to arbitrary code execution, allowing the attacker to gain control over the device.

Exploitation Methods:

• Crafted HTTP Requests: An attacker can send malicious HTTP requests to the /goform/PPTPDClient endpoint with a manipulated Username parameter.
• Automated Scripts: Attackers can use automated scripts to scan for vulnerable devices and exploit them en masse.
• Public Exploits: Given that the exploit is public, attackers can easily find and use existing proof-of-concept (PoC) code to exploit the vulnerability.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Product: Tenda WH450
• Version: 1.0.0.18

Other versions of the Tenda WH450 and similar devices from Tenda may also be affected, but this has not been confirmed. Users and administrators should verify the version of their devices and apply updates as necessary.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patch Management: Apply the latest firmware updates provided by Tenda.
• Network Segmentation: Isolate vulnerable devices from critical networks to limit potential damage.
• Firewall Rules: Implement strict firewall rules to block unauthorized access to the device.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity targeting the vulnerable endpoint.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits and vulnerability assessments.
• User Education: Educate users on the importance of updating firmware and recognizing potential security threats.
• Vendor Communication: Maintain open communication with Tenda for updates and patches.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European cybersecurity, particularly for organizations and individuals using Tenda WH450 routers. The potential for remote exploitation and the availability of public exploits increase the likelihood of widespread attacks. This could lead to data breaches, loss of service, and potential entry points for further attacks within European networks.

6. Technical Details for Security Professionals

Vulnerability Details:

• Component: HTTP Request Handler
• File: /goform/PPTPDClient
• Vulnerable Function: Unknown function handling the Username argument
• Type: Stack-based buffer overflow

Exploitation Steps:

1. Identify Target: Scan for Tenda WH450 routers running version 1.0.0.18.
2. Craft Payload: Create a malicious HTTP request with a manipulated Username parameter.
3. Send Request: Send the crafted request to the /goform/PPTPDClient endpoint.
4. Exploit: Trigger the buffer overflow to execute arbitrary code.

References:

• VulDB Entry
• CTI Entry
• Submission Details
• GitHub PoC
• Tenda Official Website
• NVD Entry

Aliases:

• CVE-2025-15047

Assigner:

• VulDB

EPSS:

• N/A

ENISA IDs:

• Product: 25211e2f-1e93-3dd1-90c6-0c7d0cdc8997
• Vendor: 0280497c-0438-31dd-b5e9-d5d24aa8c81a

This analysis underscores the critical nature of the vulnerability and the urgent need for mitigation strategies to protect against potential exploitation.