CVE-2026-32861: Out-of-Bounds Write Vulnerability in NI LabVIEW when loading lvclass file

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-07 · updated 2026-07-24
Weakness: CWE-787

Description

There is a memory corruption vulnerability due to an out-of-bounds write when loading a corrupted LVCLASS file in NI LabVIEW. This vulnerability may result in information disclosure or arbitrary code execution. Successful exploitation requires an attacker to get a user to open a specially crafted .lvclass file. This vulnerability affects NI LabVIEW 2026 Q1 (26.1.0) and prior versions.

Affected products

NI LabVIEW: through 2022; 2023-q1, 2023-q3, 2023-q3_patch1, 2023-q3_patch2, 2023-q3_patch3, 2023-q3_patch4 (+22)

References

https://www.ni.com/en/support/security/available-critical-and-security-updates-for-ni-software/2026/lv-class-file-parsing-memory-corruption-vulnerability-in-ni-labview.html

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