CVE-2025-33213
📋 TL;DR
CVE-2025-33213 is a deserialization vulnerability in NVIDIA Merlin Transformers4Rec for Linux, allowing attackers to execute arbitrary code, cause denial of service, disclose information, or tamper with data. It affects users of the Trainer component in vulnerable versions, potentially compromising systems running this software.
💻 Affected Systems
- NVIDIA Merlin Transformers4Rec
⚠️ 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
Remote code execution leading to full system compromise, data theft, or persistent backdoor installation.
Likely Case
Denial of service or data tampering due to exploitation of deserialization flaws in controlled environments.
If Mitigated
Limited impact if network access is restricted and patches are applied promptly, reducing exploitability.
🎯 Exploit Status
Deserialization vulnerabilities often have low complexity; exploitability depends on access to the vulnerable component.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check NVIDIA advisory for specific patched versions.
Vendor Advisory: https://nvidia.custhelp.com/app/answers/detail/a_id/5739
Restart Required: Yes
Instructions:
1. Review NVIDIA advisory for affected versions. 2. Update to the latest patched version of NVIDIA Merlin Transformers4Rec. 3. Restart services or systems as required.
🔧 Temporary Workarounds
Restrict Network Access
linuxLimit access to the Trainer component to trusted networks only.
Use firewall rules (e.g., iptables) to block external access to relevant ports.
🧯 If You Can't Patch
- Isolate the system in a segmented network to reduce attack surface.
- Monitor logs for unusual deserialization activity and implement strict input validation.
🔍 How to Verify
Check if Vulnerable:
Check the installed version of NVIDIA Merlin Transformers4Rec against the vendor advisory.Check Version:
Run 'pip show transformers4rec' or check package manager for version details.Verify Fix Applied:
Confirm version update to patched release and test functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual deserialization errors or unexpected process executions in application logs.
Network Indicators:
- Suspicious inbound connections to Trainer component ports.
SIEM Query:
Search for logs containing 'deserialization' or 'Trainer' errors from NVIDIA Merlin applications.