EUVD-2025-4151

Comprehensive Technical Analysis of EUVD-2025-4151

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-4151, also known as CVE-2025-26339, is classified as a CWE-306 "Missing Authentication for Critical Function." This type of vulnerability occurs when a critical function does not require authentication, allowing unauthorized access. 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 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) - The vulnerability has a high impact on confidentiality.
• Integrity (I): High (H) - The vulnerability has a high impact on integrity.
• Availability (A): High (H) - The vulnerability has a high impact on availability.

Given these factors, the vulnerability poses a significant risk to the confidentiality, integrity, and availability of affected systems.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector for this vulnerability is through crafted HTTP requests. An unauthenticated remote attacker can exploit the vulnerability by sending specially crafted HTTP requests to the maxtime/handleRoute.lua script in Q-Free MaxTime. Potential exploitation methods include:

• Unauthorized Access: Gaining access to sensitive functions without proper authentication.
• Data Exfiltration: Extracting confidential information from the device.
• Data Manipulation: Altering data integrity by modifying critical information.
• Denial of Service (DoS): Disrupting the availability of the device by overwhelming it with malicious requests.

3. Affected Systems and Software Versions

The vulnerability affects Q-Free MaxTime versions less than or equal to 2.11.0. Organizations using these versions are at risk and should prioritize mitigation efforts.

4. Recommended Mitigation Strategies

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

• Patch Management: Upgrade to a patched version of Q-Free MaxTime that addresses this vulnerability.
• Network Segmentation: Implement network segmentation to isolate critical systems and reduce the attack surface.
• Access Controls: Enforce strict access controls and authentication mechanisms to prevent unauthorized access.
• Monitoring and Logging: Implement robust monitoring and logging to detect and respond to suspicious activities.
• Intrusion Detection/Prevention Systems (IDS/IPS): Deploy IDS/IPS to identify and block malicious traffic.
• Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and address potential weaknesses.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant threat to European organizations using Q-Free MaxTime, particularly those in critical infrastructure sectors such as transportation, energy, and public services. The potential for unauthorized access, data manipulation, and denial of service can lead to severe disruptions and financial losses. European cybersecurity authorities should prioritize awareness campaigns and provide guidance to affected organizations to ensure timely mitigation.

6. Technical Details for Security Professionals

• Vulnerability Location: The vulnerability resides in the maxtime/handleRoute.lua script within Q-Free MaxTime.
• Exploitation: The attacker can exploit the vulnerability by sending crafted HTTP requests to the affected script.
• Detection: Security professionals should look for unusual HTTP traffic patterns, unauthorized access attempts, and anomalies in system logs.
• Response: In case of detection, immediate actions should include isolating the affected system, applying patches, and conducting a thorough investigation to determine the extent of the compromise.

Conclusion

EUVD-2025-4151 is a critical vulnerability that requires immediate attention from cybersecurity professionals. Organizations should prioritize patching affected systems, implementing robust security controls, and maintaining vigilant monitoring to mitigate the risk. The European cybersecurity landscape must be prepared to address such vulnerabilities to ensure the resilience and security of critical infrastructure.

References

• Nozomi Networks Vulnerability Advisory
• NVD Detail for CVE-2025-26339