Deserialization in NVIDIA Megatron Lm
CVE-2025-33247
NVIDIA Megatron LM contains a vulnerability in quantization configuration loading, which could allow remote code execution. A successful exploit of this vulnerability might lead to code execution, escalation of privileges, information disclosure, and data tampering.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- NVIDIA Megatron Lm — versions All versions prior to 0.15.3
- NVIDIA Megatron-Lm
Weakness classification (CWE)
References
- nvd.nist.gov/vuln/detail/CVE-2025-33247 (US Government Resource, Third Party Advisory)
- www.cve.org/CVERecord (Third Party Advisory)
- nvidia.custhelp.com/app/answers/detail/a_id/5769 (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-33247?
- CVE-2025-33247 is a high-severity vulnerability in NVIDIA Megatron Lm, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2026-03-24.
- How severe is CVE-2025-33247?
- High severity. CVSS v3 base score is 7.8 out of 10.