EUVD-2025-25627

Comprehensive Technical Analysis of EUVD-2025-25627

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-25627, also known as CVE-2025-26496, is classified as an "Access of Resource Using Incompatible Type ('Type Confusion')" issue in Salesforce Tableau Server and Tableau Desktop. This vulnerability allows for Local Code Inclusion, which is a severe form of vulnerability that can lead to arbitrary code execution.

Severity Evaluation:

• Base Score: 9.6 (Critical)
• Base Score Version: CVSS 3.1
• Base Score Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

The CVSS score of 9.6 indicates a critical vulnerability. The vector string breaks down as follows:

• AV:A (Adjacent Network): The attacker must be on the same local network.
• AC:L (Low Complexity): The attack requires low skill or resources.
• PR:N (No Privileges Required): No privileges are required to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required.
• S:C (Changed Scope): The vulnerability can affect resources beyond the security scope managed by the security authority.
• C:H (High Confidentiality Impact): Complete loss of confidentiality.
• I:H (High Integrity Impact): Complete loss of integrity.
• A:H (High Availability Impact): Complete loss of availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Local Network Access: An attacker with access to the local network can exploit this vulnerability.
• File Upload Modules: The vulnerability is specifically related to the file upload modules in Tableau Server and Tableau Desktop.

Exploitation Methods:

• Type Confusion: The attacker can manipulate the type of data being processed, leading to the execution of unintended code.
• Local Code Inclusion: By exploiting the type confusion, the attacker can include and execute arbitrary code on the affected system.

3. Affected Systems and Software Versions

Affected Products:

• Tableau Server
• Tableau Desktop

Affected Versions:

• Before 2025.1.3
• Before 2024.2.12
• Before 2023.3.19

Operating Systems:

• Windows
• Linux

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Upgrade to the latest versions of Tableau Server and Tableau Desktop that address this vulnerability.
• Network Segmentation: Implement strict network segmentation to limit access to vulnerable systems.
• Access Controls: Enforce strict access controls to limit who can upload files to the affected modules.

Long-Term Strategies:

• Regular Updates: Ensure that all software is regularly updated and patched.
• Security Audits: Conduct regular security audits and vulnerability assessments.
• User Training: Educate users on the risks of file uploads and the importance of following security protocols.

5. Impact on European Cybersecurity Landscape

The critical nature of this vulnerability poses a significant risk to organizations using Tableau Server and Tableau Desktop within the European Union. Given the widespread use of Tableau for data visualization and analytics, the potential for data breaches, unauthorized access, and system compromises is high. This vulnerability underscores the need for robust cybersecurity measures and continuous monitoring within the EU.

6. Technical Details for Security Professionals

Vulnerability Details:

• Type Confusion: This occurs when a program uses or processes data based on its type, but the type information is incorrect or manipulated.
• Local Code Inclusion: This allows an attacker to include and execute arbitrary code, potentially leading to full system compromise.

Detection and Response:

• Log Analysis: Monitor logs for unusual file upload activities and type mismatches.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious activities related to file uploads.
• Incident Response Plan: Have a well-defined incident response plan in place to quickly address any detected exploitation attempts.

References:

• Salesforce Help Article
• CVE Record

Conclusion: EUVD-2025-25627 is a critical vulnerability that requires immediate attention from organizations using Tableau Server and Tableau Desktop. By implementing the recommended mitigation strategies and maintaining vigilant security practices, organizations can significantly reduce the risk of exploitation.