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CVE-2025-33239 NVIDIA CVE debrief

CVE-2025-33239 is a high-severity vulnerability in NVIDIA Megatron Bridge, a component of the NVIDIA Nemo Megatron Bridge product. The vulnerability is caused by a code injection issue in a data merging tutorial, which could allow an attacker to execute arbitrary code, escalate privileges, disclose information, and tamper with data. The Common Vulnerability Scoring System (CVSS) score for this vulnerability is 7.8, indicating a high level of severity. The vulnerability was published on February 18, 2026, and last modified on July 2, 2026.

Vendor
NVIDIA
Product
Megatron-Bridge
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-02-18
Original CVE updated
2026-07-02
Advisory published
2026-02-18
Advisory updated
2026-07-02

Who should care

Organizations using NVIDIA Megatron Bridge should prioritize patching this vulnerability to prevent potential code execution, privilege escalation, and data tampering. This vulnerability is particularly concerning for environments where NVIDIA Megatron Bridge is used in critical infrastructure, data centers, or other high-risk applications. Security teams should review their inventory of NVIDIA products and apply patches or mitigations as recommended by the vendor.

Technical summary

The vulnerability is caused by a code injection issue in a data merging tutorial of NVIDIA Megatron Bridge. An attacker could exploit this vulnerability by providing malicious input, potentially leading to code execution, escalation of privileges, information disclosure, and data tampering. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating a high level of severity. The vulnerability is classified under CWE-94, which is related to code injection attacks.

Defensive priority

High priority should be given to patching this vulnerability, as it could allow an attacker to execute arbitrary code and escalate privileges. Organizations should review their inventory of NVIDIA products and apply patches or mitigations as recommended by the vendor.

Recommended defensive actions

  • Review and apply patches or mitigations recommended by NVIDIA for CVE-2025-33239.
  • Conduct a thorough inventory of NVIDIA Megatron Bridge usage within the organization.
  • Implement compensating controls, such as input validation and code reviews, to mitigate the vulnerability.
  • Monitor for suspicious activity related to NVIDIA Megatron Bridge.
  • Update incident response plans to include procedures for responding to potential code injection attacks.

Evidence notes

The CVE-2025-33239 vulnerability is documented in the official CVE record and the National Vulnerability Database (NVD). The vulnerability is caused by a code injection issue in a data merging tutorial of NVIDIA Megatron Bridge. NVIDIA has provided a vendor advisory with mitigation recommendations. The CWE classification for this vulnerability is CWE-94, which is related to code injection attacks.

Official resources

This article is AI-assisted and based on the supplied source corpus.