EUVD-2025-15826

Comprehensive Technical Analysis of EUVD-2025-15826

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-15826, also known as CVE-2025-4978, is classified as very critical. It affects the Netgear DGND3700 router, specifically version 1.1.00.15_1.00.15NA. The vulnerability is located in the Basic Authentication component, particularly in the file /BRS_top.html. The manipulation of this file leads to improper authentication, allowing unauthorized access.

The CVSS (Common Vulnerability Scoring System) base score of 9.3 indicates a high severity. The vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N breaks down as follows:

• AV:N (Attack Vector: Network) - The vulnerability can be exploited remotely over the network.
• AC:L (Attack Complexity: Low) - The attack requires minimal skill or resources.
• AT:N (Attack Technique: Network) - The attack technique involves network-based methods.
• PR:N (Privileges Required: None) - No privileges are required to exploit the vulnerability.
• UI:N (User Interaction: None) - No user interaction is required.
• VC:H (Vulnerability Confidentiality: High) - The vulnerability has a high impact on confidentiality.
• VI:H (Vulnerability Integrity: High) - The vulnerability has a high impact on integrity.
• VA:H (Vulnerability Availability: High) - The vulnerability has a high impact on availability.
• SC:N (Scope Change: None) - The vulnerability does not change the security scope.
• SI:N (Scope Integrity: None) - The vulnerability does not affect the integrity of the security scope.
• SA:N (Scope Availability: None) - The vulnerability does not affect the availability of the security scope.

2. Potential Attack Vectors and Exploitation Methods

Given the nature of the vulnerability, potential attack vectors include:

• Remote Exploitation: Attackers can exploit the vulnerability over the network without needing physical access to the device.
• Man-in-the-Middle (MitM) Attacks: Attackers could intercept and manipulate authentication requests to gain unauthorized access.
• Credential Stuffing: Attackers might use known credentials to exploit the improper authentication mechanism.
• Brute Force Attacks: Due to the low complexity of the attack, brute force methods could be employed to gain access.

3. Affected Systems and Software Versions

The primary affected system is the Netgear DGND3700 router, version 1.1.00.15_1.00.15NA. However, the entry notes that other products might be affected as well, suggesting that similar vulnerabilities could exist in other Netgear devices or firmware versions.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following strategies are recommended:

• Firmware Update: Immediately update the firmware to the latest version provided by Netgear.
• Network Segmentation: Isolate the affected devices on a separate network segment to limit potential attack surfaces.
• Access Control: Implement strict access control measures, including strong password policies and multi-factor authentication (MFA).
• Monitoring and Logging: Enable comprehensive logging and monitoring to detect any suspicious activities.
• Firewall Configuration: Configure firewalls to restrict access to the router's management interface from untrusted networks.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European cybersecurity, particularly for organizations and individuals using the affected Netgear devices. Unauthorized access to these devices can lead to data breaches, network compromises, and potential disruptions in service. Given the widespread use of Netgear routers, the impact could be extensive, affecting both residential and commercial users.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerable File: The vulnerability is located in the /BRS_top.html file, which is part of the Basic Authentication component.
• Exploit Availability: The exploit has been disclosed to the public, and proof-of-concept (PoC) code may be available. Security teams should be vigilant for any signs of exploitation.
• References:
  • VulDB Entry
  • CTI Entry
  • Submission Details
  • GitHub Repository
  • Netgear Official Website
  • NVD Entry

Security professionals should prioritize patching affected devices and implementing robust monitoring and incident response plans to mitigate the risk associated with this vulnerability.

Conclusion

EUVD-2025-15826 represents a critical vulnerability in Netgear DGND3700 routers that requires immediate attention. By understanding the attack vectors, affected systems, and mitigation strategies, organizations can effectively protect their networks and data from potential exploitation. Continuous monitoring and proactive security measures are essential to safeguard against such high-severity vulnerabilities.