CVE-2026-64203 in LabVIEW
Summary
by MITRE • 08/25/2026
There is a memory corruption vulnerability recently discovered in NI LabVIEW that may result in information disclosure or arbitrary code execution. Successful exploitation requires an attacker to get a user to open a specially crafted VI. This vulnerability affects NI LabVIEW 2026 Q3 (26.3.0) and prior versions.
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Analysis
by VulDB Data Team • 08/25/2026
The National Instruments LabVIEW platform, widely utilized in engineering and scientific applications for graphical programming, has been identified with a critical memory corruption flaw that poses significant risks to system integrity and confidentiality. This vulnerability stems from improper handling of data structures within the execution environment when processing specially crafted Virtual Instrument files, commonly referred to as VIs. The root cause lies in how the software manages memory allocation and deallocation during the parsing or rendering of complex graphical elements contained within these project files. When a user opens a maliciously constructed VI file that contains malformed data or specific edge-case inputs, the application fails to correctly validate buffer boundaries or manage heap metadata. This oversight leads to either an out-of-bounds write or use-after-free condition, depending on the specific trigger mechanism within the code path. Such memory corruption errors are particularly dangerous because they allow attackers to manipulate the internal state of the running process in ways that were not intended by the developers, creating a pathway for severe security breaches.
The operational impact of this vulnerability is twofold, encompassing both unauthorized information disclosure and arbitrary code execution. In scenarios where the memory corruption results in an out-of-bounds read or allows access to uninitialized memory regions, sensitive data residing within the application's address space may be leaked to the attacker. This could include credentials, proprietary algorithms, or other confidential project details stored temporarily during processing. More critically, if the vulnerability is exploited through a heap overflow or similar mechanism that overwrites function pointers or object headers, an attacker can achieve arbitrary code execution with the privileges of the user running LabVIEW. Since engineers often run these applications with elevated permissions to interact with hardware controllers and measurement devices, successful exploitation could grant full control over the host system. This capability enables attackers to install malware, establish persistent backdoors, pivot into internal networks, or disrupt critical industrial operations that rely on NI hardware integration.
From a threat modeling perspective, this vulnerability aligns closely with Common Weakness Enumeration categories such as CWE-120 Buffer Copy without Checking Size of Input and CWE-416 Use After Free, which describe the fundamental memory safety failures involved. The attack vector is classified under ATT&CK technique T1203 Exploitation for Client Execution, specifically leveraging user interaction to trigger code execution through a malicious file opening event. This classification highlights that while the vulnerability exists in the software itself, successful exploitation relies heavily on social engineering or phishing tactics where an adversary tricks a target into opening the crafted VI file. The requirement for user interaction does not diminish the severity but rather defines the primary method of delivery, making awareness and strict input validation crucial defense layers.
Mitigation strategies must address both immediate remediation and long-term security hygiene. National Instruments has released updates to patch this issue in versions subsequent to 2026 Q3 (26.3.0), so organizations should immediately upgrade their LabVIEW installations to the latest stable release that includes these fixes. For environments where upgrading is not immediately feasible, strict network segmentation and application whitelisting can help limit the blast radius if an exploit occurs. Additionally, implementing file integrity monitoring on directories containing VI projects can detect unauthorized modifications or suspicious file creations. Users should be trained to exercise caution when opening LabVIEW files from untrusted sources, treating them with the same level of scrutiny as executable binaries. Regular security assessments and penetration testing focused on graphical programming environments can further help identify similar logic flaws before they are exploited in production settings.