EUVD-2025-3052

Comprehensive Technical Analysis of EUVD-2025-3052

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in EUVD-2025-3052 pertains to a command injection flaw in the Tenda ac9 v1.0 firmware version v15.03.05.19. This vulnerability is located in the /goform/SetSambaCfg endpoint, which allows for remote arbitrary code execution. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical 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:

• 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 special privileges are needed 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) - The vulnerability can lead to a complete breach of confidentiality.
• Integrity (I): High (H) - The vulnerability can lead to a complete breach of integrity.
• Availability (A): High (H) - The vulnerability can lead to a complete breach of availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is through the network, specifically targeting the /goform/SetSambaCfg endpoint. An attacker can exploit this vulnerability by sending crafted HTTP requests that inject malicious commands. These commands can be executed with the privileges of the web server process, potentially leading to:

• Remote Code Execution (RCE): Executing arbitrary commands on the device.
• Data Exfiltration: Stealing sensitive information stored on the device.
• Denial of Service (DoS): Disrupting the normal operation of the device.

3. Affected Systems and Software Versions

The vulnerability affects Tenda ac9 v1.0 devices running firmware version v15.03.05.19. It is crucial to note that other versions of the firmware or similar devices might also be affected if they share the same codebase or components.

4. Recommended Mitigation Strategies

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

• Firmware Update: Immediately update the firmware to a patched version provided by Tenda.
• Network Segmentation: Isolate the affected devices from critical networks to limit the potential impact.
• Access Control: Implement strict access controls to restrict who can access the device's management interface.
• Monitoring and Logging: Enable logging and monitoring to detect any suspicious activities or unauthorized access attempts.
• Firewall Rules: Configure firewall rules to block unauthorized access to the management interface.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using Tenda ac9 v1.0 devices. The potential for remote code execution can lead to widespread compromise, data breaches, and service disruptions. Given the critical nature of the vulnerability, it is essential for European cybersecurity authorities to issue advisories and ensure that affected parties take immediate action to mitigate the risk.

6. Technical Details for Security Professionals

Vulnerability Details:

• Endpoint: /goform/SetSambaCfg
• Vulnerable Function: doSystemCmd
• Exploitation Method: Command injection via crafted HTTP requests.

Detection and Response:

• Intrusion Detection Systems (IDS): Configure IDS to detect and alert on suspicious traffic targeting the /goform/SetSambaCfg endpoint.
• Incident Response: Develop an incident response plan that includes steps for identifying compromised devices, isolating them, and applying patches.
• Forensic Analysis: Perform forensic analysis on affected devices to understand the extent of the compromise and identify any additional vulnerabilities.

References:

• Vulnerability Report: Tenda AC9V1-0 V15-03-05-19 formSetSambaConf doSystemCmd CI
• CVE Identifier: CVE-2025-22949

By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of exploitation and protect their networks and data from potential threats.