EUVD-2026-10024

Comprehensive Technical Analysis of EUVD-2026-10024

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2026-10024 pertains to an incomplete whitelist enforcement in the CROWN REST interface, which allows unauthenticated access to restricted filesystem areas. This flaw can be exploited to place a manipulated parameter file that becomes active after a device reboot, enabling the modification of critical device settings, including network configuration and application parameters.

Severity Evaluation:

• Base Score: 9.4 (Critical)
• Base Score Version: CVSS 3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

The high base score indicates a critical vulnerability due to the ease of exploitation (low attack complexity) and the significant impact on integrity and availability. The confidentiality impact is low, but the integrity and availability impacts are high, making this a severe issue.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network Access (AV:N): The attacker can exploit the vulnerability remotely over the network.
• Low Attack Complexity (AC:L): The exploitation does not require specialized conditions or knowledge.
• No Authentication Required (PR:N): The attacker does not need to authenticate to exploit the vulnerability.
• No User Interaction (UI:N): The attack does not require any interaction from the user.

Exploitation Methods:

• Unauthenticated Access: An attacker can access restricted filesystem areas without authentication.
• Parameter File Manipulation: The attacker can place a manipulated parameter file in the accessible directories.
• Reboot Activation: The manipulated parameter file becomes active after a device reboot, allowing the attacker to modify critical settings.

3. Affected Systems and Software Versions

The vulnerability affects the following products and versions:

• SICK Lector83x: Versions prior to 2.8.0
• SICK Lector85x: Versions prior to 2.8.0

These devices are commonly used in industrial automation and sensor technology, making them critical components in various industrial control systems (ICS).

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Patching: Upgrade to the latest software version (2.8.0 or higher) provided by SICK AG.
• Network Segmentation: Isolate affected devices from untrusted networks to limit exposure.
• Access Control: Implement strict access controls and monitoring to detect unauthorized access attempts.

Long-Term Mitigation:

• Regular Audits: Conduct regular security audits and vulnerability assessments.
• Security Training: Provide training for staff on identifying and responding to security threats.
• Incident Response Plan: Develop and maintain an incident response plan specific to ICS environments.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European industrial sectors that rely on SICK AG devices for automation and sensor technology. The potential for unauthenticated access and manipulation of critical settings can lead to operational disruptions, data breaches, and safety hazards. This underscores the need for robust cybersecurity measures in ICS environments, particularly in sectors such as manufacturing, energy, and transportation.

6. Technical Details for Security Professionals

Vulnerability Details:

• CROWN REST Interface: The interface allows interaction with the device's filesystem.
• Whitelist Enforcement: The whitelist is incomplete, leaving certain directories accessible without authentication.
• Parameter File Manipulation: The attacker can place a manipulated parameter file in these directories, which becomes active after a reboot.

Detection and Monitoring:

• Log Analysis: Monitor logs for unauthorized access attempts to restricted filesystem areas.
• Intrusion Detection Systems (IDS): Deploy IDS to detect suspicious network activity targeting the CROWN REST interface.
• File Integrity Monitoring: Implement file integrity monitoring to detect changes in critical parameter files.

References:

• SICK AG PSIRT: SICK PSIRT
• Operating Guidelines: SICK Operating Guidelines
• CISA Recommended Practices: CISA ICS Recommended Practices
• CVSS Calculator: CVSS 3.1 Calculator
• CSAF Reports: SICK CSAF Reports and PDF
• NVD Entry: CVE-2026-2330

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risk of exploitation and ensure the integrity and availability of their industrial control systems.