CVE-2026-32861

Arbitrary code execution via LVCLASS out-of-bounds write

Published Apr 7, 2026 · Updated Apr 7, 2026

Out-of-bounds write in NI LabVIEW 2026 Q1 and earlier allows context-dependent attackers to execute arbitrary code via an LVCLASS file. The LVCLASS file parser fails to validate user-supplied class data before writing it to memory, corrupting process memory outside the intended bounds. Exploitation requires a user to open a specially crafted .lvclass file, after which code runs in the context of the LabVIEW process or process memory is disclosed.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in NI LabVIEW 2026 Q1 and earlier allows context-dependent attackers to execute arbitrary code via an LVCLASS file. The LVCLASS file parser fails to validate user-supplied class data before writing it to memory, corrupting process memory outside the intended bounds. Exploitation requires a user to open a specially crafted .lvclass file, after which code runs in the context of the LabVIEW process or process memory is disclosed.

The record

CVE
CVE-2026-32861
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
National Instruments
Product
LabVIEW
Classifications
CWE-787, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <23.0.0
  2. Affected versionversion=23.1.0 <23.3.9
  3. Affected versionversion=24.1.0 <24.3.6
  4. Affected versionversion=25.1.0 <25.3.4
  5. Affected versionversion=26.1.0 <26.1.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

National Instruments · LabVIEWversion=0 <23.0.0; version=23.1.0 <23.3.9; version=24.1.0 <24.3.6; version=25.1.0 <25.3.4; version=26.1.0 <26.1.1

Published CVSS scores

8.5NICVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8NICVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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