CVE-2025-15339
📋 TL;DR
CVE-2025-15339 is an incorrect default permissions vulnerability in Tanium Discover that allows unauthorized users to access sensitive information. This affects organizations using Tanium Discover with default configurations, potentially exposing internal network data and asset information.
💻 Affected Systems
- Tanium Discover
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain unauthorized access to sensitive network discovery data, enabling reconnaissance for further attacks or data exfiltration.
Likely Case
Internal users with limited permissions can access discovery data beyond their authorization level, violating least privilege principles.
If Mitigated
Proper access controls and network segmentation limit exposure, reducing impact to isolated data sets.
🎯 Exploit Status
Exploitation requires some level of access to Tanium environment but leverages default misconfigurations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Tanium advisory TAN-2025-029 for specific patched versions
Vendor Advisory: https://security.tanium.com/TAN-2025-029
Restart Required: Yes
Instructions:
1. Review Tanium advisory TAN-2025-029. 2. Update Tanium Discover to patched version. 3. Restart Tanium services. 4. Verify permissions are correctly configured.
🔧 Temporary Workarounds
Manual Permission Review
allReview and tighten Discover module permissions manually
Review Tanium Console > Discover module permissions
🧯 If You Can't Patch
- Implement strict network segmentation around Tanium servers
- Enable detailed audit logging for all Discover module access
🔍 How to Verify
Check if Vulnerable:
Check Tanium version and compare against advisory TAN-2025-029Check Version:
Check Tanium Console > About or use Tanium CLI commandsVerify Fix Applied:
Verify Tanium Discover version is updated and test permissions with limited user accounts📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to Discover data
- Permission changes in Tanium logs
Network Indicators:
- Unusual data queries from non-admin accounts
SIEM Query:
source="tanium" AND (event_type="permission_violation" OR module="discover")