CVE-2025-64465 is an out-of-bounds read vulnerability classified under CWE-125 found in the NI LabVIEW software, specifically within the lvre!DataSizeTDR() function responsible for parsing VI (Virtual Instrument) files. When LabVIEW processes a corrupted or specially crafted VI file, this vulnerability can cause the program to read memory outside the intended buffer boundaries. This memory corruption can lead to two primary attack outcomes: information disclosure, where sensitive data from memory may be leaked, and arbitrary code execution, where an attacker could execute malicious code within the context of the LabVIEW process. Exploitation requires an attacker to convince a user to open a malicious VI file, which implies user interaction is necessary. The vulnerability affects all versions up to and including NI LabVIEW 2025 Q3 (version 25.3) and prior releases such as 23.1.0, 24.1.0, and 25.1.0. The CVSS v3.1 base score is 7.8, indicating high severity with attack vector local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), user interaction required (UI:R), unchanged scope (S:U), and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). No public exploits have been reported yet, but the vulnerability poses a significant risk due to the potential for arbitrary code execution. NI has not yet published patches at the time of this report, so mitigation relies on defensive measures and cautious handling of VI files.

The vulnerability poses a significant threat to organizations using NI LabVIEW, particularly in industrial automation, scientific research, and engineering environments where LabVIEW is widely deployed. Successful exploitation could lead to unauthorized disclosure of sensitive data, including intellectual property or operational data embedded in memory. More critically, arbitrary code execution could allow attackers to take control of affected systems, potentially disrupting critical processes, manipulating data, or establishing persistence within networks. Given LabVIEW's role in controlling hardware and instrumentation, exploitation could have downstream effects on physical systems, increasing the risk of operational disruption or safety hazards. The requirement for user interaction limits mass exploitation but does not eliminate targeted attacks, especially spear-phishing campaigns delivering malicious VI files. The absence of known exploits in the wild currently reduces immediate risk but does not preclude future attacks. Organizations failing to address this vulnerability may face data breaches, operational downtime, and reputational damage.

To mitigate this vulnerability, organizations should implement the following specific measures: 1) Restrict the sources of VI files to trusted and verified origins, avoiding opening VI files from untrusted or unknown sources. 2) Employ application whitelisting and endpoint protection solutions capable of detecting anomalous behavior or exploitation attempts related to LabVIEW processes. 3) Educate users on the risks of opening unsolicited or suspicious VI files, emphasizing cautious handling of files received via email or external media. 4) Monitor system and network logs for unusual activity related to LabVIEW or file parsing errors that could indicate exploitation attempts. 5) Isolate LabVIEW workstations in segmented network zones to limit lateral movement if compromise occurs. 6) Maintain regular backups of critical VI files and system configurations to enable recovery from potential compromise. 7) Stay alert for official patches or updates from NI and apply them promptly once available. 8) Consider deploying sandbox environments to open and analyze VI files safely before use in production. These targeted actions go beyond generic advice by focusing on the unique context of LabVIEW and VI file handling.