CVE-2025-33229: 
CUDA Toolkit vulnerability analysis and mitigation

CVE-2025-33229 is an uncontrolled search path element vulnerability in NVIDIA Nsight Monitor, a component of NVIDIA Nsight Visual Studio for Windows. It allows a local attacker to execute arbitrary code with the same privileges as the NVIDIA Nsight Visual Studio Edition Monitor application. The vulnerability affects NVIDIA CUDA Toolkit versions prior to 13.1.0 on Windows. It was published on January 20, 2026, with an initial NVD analysis completed on February 2, 2026. NVIDIA assigned a CVSS v3.1 base score of 7.3 (High) (Feedly, NVIDIA Advisory).

The root cause is classified as CWE-427 (Uncontrolled Search Path Element), meaning the application resolves executable or library paths in an insecure manner that can be influenced by a local attacker. This is consistent with DLL search order hijacking (MITRE ATT&CK T1574.001) or PATH environment variable manipulation (T1574.007), where a malicious binary or library placed in a directory that the application searches before legitimate locations gets loaded and executed. Exploitation requires low privileges and user interaction, limiting the attack surface to local access scenarios (Feedly, NVIDIA Advisory).

Successful exploitation allows an attacker to execute arbitrary code at the privilege level of the NVIDIA Nsight Monitor application. According to NVIDIA, this can lead to escalation of privileges, data tampering, denial of service, and information disclosure — all three CIA triad dimensions are rated High impact. The scope is limited to the local system (unchanged scope), but privilege escalation could enable further lateral movement within a compromised environment (NVIDIA Advisory, Feedly).

1. Reconnaissance: Identify a target Windows system with NVIDIA CUDA Toolkit (versions prior to 13.1.0) installed, specifically with the Nsight Visual Studio Edition and its Nsight Monitor component present.
2. Identify search path: Determine the directories that the Nsight Monitor application searches when loading executables or DLLs — this may include the current working directory, user-writable directories in the PATH, or application-relative paths.
3. Plant malicious binary/DLL: Place a crafted malicious DLL or executable with the expected name in a directory that appears earlier in the search order than the legitimate binary location, leveraging write access available to a low-privileged user.
4. Trigger execution: Induce user interaction (e.g., launching Nsight Monitor or a related Visual Studio operation) that causes the application to load the malicious file from the attacker-controlled path.
5. Achieve code execution: The malicious code executes with the same privileges as the Nsight Monitor process, potentially enabling privilege escalation, persistence, or data exfiltration (Feedly, NVIDIA Advisory).

• File System: Unexpected DLL or executable files placed in directories within the system or user PATH that match names of libraries loaded by Nsight Monitor; files with recent creation timestamps in user-writable directories adjacent to NVIDIA Nsight installation paths.
• Process: Unusual child processes spawned by the Nsight Monitor process (e.g., cmd.exe, powershell.exe, network tools); unexpected network connections originating from the Nsight Monitor process.
• Logs: Windows Event Logs showing DLL load events from non-standard paths for the Nsight Monitor process; Sysmon Event ID 7 (Image Loaded) entries referencing DLLs loaded from user-writable or temp directories by NsightMonitor.exe or related processes.
• Registry: Modifications to PATH environment variables (HKLM or HKCU) adding new user-writable directories that could intercept DLL resolution.

NVIDIA has released a patch addressing this vulnerability in CUDA Toolkit version 13.1.0 and later. Users should update to CUDA Toolkit 13.1.0 or newer via the NVIDIA support portal. As interim mitigations, administrators should restrict local user write access to directories in the system PATH, limit the number of users with local access to systems running Nsight Monitor, and monitor for suspicious process activity originating from NVIDIA Nsight components (NVIDIA Advisory, Feedly).

Security news outlets including SecurityOnline.info and GBHackers covered the vulnerability as part of broader reporting on NVIDIA CUDA Toolkit security flaws disclosed in January 2026, characterizing them as high-severity code execution risks (SecurityOnline, GBHackers). Tenable added detection coverage via Nessus plugin 294838 shortly after disclosure (Tenable). No significant researcher commentary or threat actor attribution has been publicly reported.