CVE-2026-2350: Tanium Information Disclosure Vulnerability

CVE-2026-2350 Overview

CVE-2026-2350 is an information disclosure vulnerability affecting Tanium Interact and Tanium Deployment System (TDS). The vulnerability stems from improper handling of sensitive information, which is inadvertently written to log files. This weakness, classified as CWE-532 (Insertion of Sensitive Information into Log File), could allow an authenticated attacker with access to system logs to retrieve confidential data that should not be exposed.

Critical Impact

Authenticated attackers with network access could potentially exfiltrate sensitive information from improperly secured log files in Tanium Interact and TDS environments.

Affected Products

• Tanium Interact (versions not specified - refer to Tanium Security Advisory)
• Tanium Deployment System (TDS) (versions not specified - refer to Tanium Security Advisory)

Discovery Timeline

• 2026-02-20 - CVE-2026-2350 published to NVD
• 2026-02-20 - Last updated in NVD database

Technical Details for CVE-2026-2350

Vulnerability Analysis

This vulnerability involves the insertion of sensitive information into log files within Tanium Interact and TDS components. The flaw enables authenticated users with low privileges to access confidential data that is unintentionally logged during normal system operations. The vulnerability requires network access but does not require user interaction to exploit.

The root cause lies in insufficient sanitization of data before it is written to application logs. When certain operations are performed, sensitive information—such as credentials, session tokens, or other confidential data—may be captured in plain text within log entries accessible to users with log viewing permissions.

Root Cause

The vulnerability is attributed to CWE-532: Insertion of Sensitive Information into Log File. This occurs when application logging routines capture and persist sensitive data without proper redaction or filtering. In enterprise environments like Tanium, log files often contain detailed operational data for troubleshooting purposes, making them attractive targets for information harvesting if sensitive data is not properly masked.

Attack Vector

The attack requires network access to the affected Tanium components and authenticated access with low-level privileges. An attacker would need to:

1. Authenticate to the Tanium environment with valid credentials
2. Gain access to log file storage locations or log viewing interfaces
3. Parse log entries to extract sensitive information that was improperly recorded

Because the vulnerability affects confidentiality without impacting integrity or availability, the primary risk is unauthorized information disclosure rather than system compromise or service disruption.

Detection Methods for CVE-2026-2350

Indicators of Compromise

• Unusual access patterns to Tanium log directories or log management interfaces
• Bulk downloads or exports of log files from Tanium Interact or TDS systems
• Unauthorized user accounts accessing log storage locations
• Evidence of log file enumeration or parsing activity

Detection Strategies

• Monitor file access events on Tanium log directories for anomalous read operations
• Implement alerting on bulk log file access or download activities
• Review authentication logs for privilege escalation attempts targeting log access
• Deploy file integrity monitoring on sensitive log directories

Monitoring Recommendations

• Enable detailed audit logging for all Tanium administrative interfaces
• Implement centralized log collection with access controls separate from the source systems
• Configure alerts for access attempts to log storage by non-administrative accounts
• Periodically review log contents for inadvertent sensitive data exposure

How to Mitigate CVE-2026-2350

Immediate Actions Required

• Review the Tanium Security Advisory TAN-2026-008 for specific patch information
• Restrict log file access to only essential administrative personnel
• Audit current log file permissions and access controls
• Implement network segmentation to limit access to Tanium management interfaces

Patch Information

Tanium has addressed this vulnerability as documented in Security Advisory TAN-2026-008. Organizations should consult this advisory for specific version information, patch downloads, and detailed remediation guidance. Apply the vendor-provided security updates as soon as possible after testing in a non-production environment.

Workarounds

• Restrict log directory permissions to limit read access to essential administrators only
• Implement log rotation and secure deletion policies to minimize exposure window
• Deploy additional access controls or monitoring on log storage systems
• Consider encrypting log files at rest to protect sensitive data even if accessed
• Segment network access to Tanium management interfaces to reduce attack surface

# Example: Restrict log directory permissions (Linux)
chmod 750 /var/log/tanium
chown root:tanium-admins /var/log/tanium

# Enable audit logging for log file access
auditctl -w /var/log/tanium -p r -k tanium_log_access