CVE-2025-15338: Tanium Partner Integration Auth Bypass

CVE-2025-15338 Overview

CVE-2025-15338 is an incorrect default permissions vulnerability discovered in Tanium Partner Integration. This security flaw relates to CWE-276 (Incorrect Default Permissions), where system resources are created with overly permissive access controls. This type of vulnerability can allow attackers with elevated network access to read or modify sensitive data that should be protected by more restrictive permissions.

Critical Impact

Authenticated attackers with high privileges can exploit this vulnerability remotely to access or modify confidential information, potentially leading to unauthorized data exposure and integrity violations within Tanium Partner Integration deployments.

Affected Products

• Tanium Partner Integration (specific versions not disclosed in advisory)

Discovery Timeline

• February 5, 2026 - CVE CVE-2025-15338 published to NVD
• February 5, 2026 - Last updated in NVD database

Technical Details for CVE-2025-15338

Vulnerability Analysis

This vulnerability stems from incorrect default permissions (CWE-276) within the Tanium Partner Integration component. When resources are created with overly permissive default access controls, it creates a pathway for unauthorized access to sensitive data and functionality.

The vulnerability requires network access and high-level privileges to exploit, but once an attacker has the necessary access level, the exploitation complexity is low. The attack does not require user interaction and impacts both confidentiality and integrity of the affected system, though availability is not affected.

Organizations running Tanium Partner Integration should review their deployment configurations and apply the vendor-provided patches as soon as possible.

Root Cause

The root cause of CVE-2025-15338 lies in improper permission assignment during the initialization or creation of system resources within Tanium Partner Integration. When default permissions are set too broadly, authenticated users with elevated privileges can access or modify data beyond their intended authorization scope. This represents a failure to implement the principle of least privilege in the default configuration.

Attack Vector

The attack vector for this vulnerability is network-based, meaning an attacker can exploit this flaw remotely without requiring physical access to the target system. However, exploitation requires the attacker to possess high-level privileges on the target Tanium deployment.

An attacker who has obtained privileged network access to a vulnerable Tanium Partner Integration instance can leverage the misconfigured default permissions to access sensitive information that should be restricted, or modify data in ways that compromise the integrity of the system. The technical details of the exploitation mechanism are available in the Tanium Security Advisory TAN-2025-029.

Detection Methods for CVE-2025-15338

Indicators of Compromise

• Unusual access patterns to Partner Integration resources by privileged accounts
• Unexpected permission changes or access control modifications in Tanium logs
• Anomalous data access or modification events from authenticated administrative sessions

Detection Strategies

• Monitor Tanium audit logs for unusual privileged user activity targeting Partner Integration components
• Implement file integrity monitoring on Tanium Partner Integration configuration files and resources
• Review access control lists and permissions for Partner Integration resources against expected baselines

Monitoring Recommendations

• Enable comprehensive logging for all Partner Integration activities and authentication events
• Configure alerts for permission changes or access control modifications in the Tanium environment
• Regularly audit user privileges and access patterns to detect potential exploitation attempts

How to Mitigate CVE-2025-15338

Immediate Actions Required

• Review the Tanium Security Advisory TAN-2025-029 for specific remediation guidance
• Audit current permissions on Partner Integration resources and restrict overly permissive configurations
• Implement network segmentation to limit exposure of Tanium infrastructure to untrusted networks
• Review and validate all privileged account access to Tanium systems

Patch Information

Tanium has addressed this vulnerability as documented in Security Advisory TAN-2025-029. Organizations should consult this advisory for specific patch details, affected version information, and upgrade instructions. Contact Tanium support for the latest secure version of Partner Integration.

Workarounds

• Restrict network access to Tanium Partner Integration to only trusted administrative networks
• Implement strict role-based access control (RBAC) policies limiting privileged account access
• Manually review and harden default permissions on Partner Integration resources pending patch application
• Enable additional logging and monitoring to detect potential exploitation attempts