EUVD-2025-6405

Comprehensive Technical Analysis of EUVD-2025-6405

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability EUVD-2025-6405 pertains to CWE-1188: Initialization of a Resource with an Insecure Default. This issue arises when default password credentials are not changed upon first use, allowing an attacker to execute unauthorized commands. Additionally, the default username is not displayed correctly in the WebHMI interface, which can further complicate the identification and mitigation of the issue.

Severity Evaluation: The Base Score of 9.8 (CVSS:3.1) indicates a critical vulnerability. The scoring vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) highlights the following:

• Attack Vector (AV): Network (N) - The vulnerability can be exploited remotely 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 can result in a complete loss of confidentiality.
• Integrity (I): High (H) - The vulnerability can result in a complete loss of integrity.
• Availability (A): High (H) - The vulnerability can result in a complete loss of availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit the vulnerability over the network without needing physical access to the system.
• Default Credentials: The use of default passwords allows attackers to gain unauthorized access to the system.
• Misconfiguration: The incorrect display of the default username in the WebHMI interface can lead to misconfigurations and further vulnerabilities.

Exploitation Methods:

• Brute Force Attacks: Attackers can use automated tools to attempt default credentials.
• Credential Stuffing: Using known default credentials to gain access.
• Network Scanning: Identifying systems with default credentials through network scanning tools.

3. Affected Systems and Software Versions

Affected Systems:

• WebHMI: Deployed with EcoStruxure Power Automation System (EPAS).

Software Versions:

• WebHMI v4.1.0.0 and prior
• EPAS User Interface 2.6.30.19 and prior

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Change Default Credentials: Immediately change the default passwords to strong, unique passwords.
• Update Software: Apply the latest patches and updates from Schneider Electric.
• Network Segmentation: Implement network segmentation to limit the exposure of vulnerable systems.

Long-Term Mitigation:

• Regular Audits: Conduct regular security audits to identify and mitigate vulnerabilities.
• Access Controls: Implement strict access controls and monitor for unauthorized access attempts.
• User Training: Educate users on the importance of changing default credentials and maintaining strong passwords.

5. Impact on European Cybersecurity Landscape

Impact Analysis:

• Critical Infrastructure: The vulnerability affects critical infrastructure, particularly in the energy sector, which can have significant implications for national security and public safety.
• Regulatory Compliance: Organizations must ensure compliance with European cybersecurity regulations, such as the NIS Directive, to mitigate risks associated with this vulnerability.
• Supply Chain Security: The vulnerability highlights the importance of supply chain security and the need for robust vendor management practices.

6. Technical Details for Security Professionals

Technical Insights:

• Detection: Implement intrusion detection systems (IDS) and intrusion prevention systems (IPS) to monitor for unauthorized access attempts.
• Logging and Monitoring: Enable comprehensive logging and monitoring to detect and respond to suspicious activities.
• Configuration Management: Use configuration management tools to ensure that default credentials are changed and systems are configured securely.
• Patch Management: Establish a robust patch management process to ensure that systems are updated promptly with the latest security patches.

References:

• Schneider Electric Security Notice: SEVD-2025-070-03

Conclusion: The vulnerability EUVD-2025-6405 is critical and requires immediate attention. Organizations should prioritize changing default credentials, applying patches, and implementing robust security measures to mitigate the risk. The impact on European cybersecurity underscores the need for vigilant monitoring and compliance with regulatory standards.