Code execution via QualifiedName prepend out-of-bounds read
Published Aug 25, 2026 · Updated Aug 26, 2026
Out-of-bounds read in NI LabVIEW 26.3.0 and earlier allows attackers to disclose information or execute code through a crafted VI. The QualifiedName prepend function reads beyond a buffer while LabVIEW loads malformed VI data; NI has not disclosed the exact unchecked length operation. Exploitation requires a local user to open the file, after which processing exposes process memory or executes code in that user's context.
Summary
What happened
Out-of-bounds read in NI LabVIEW 26.3.0 and earlier allows attackers to disclose information or execute code through a crafted VI. The QualifiedName prepend function reads beyond a buffer while LabVIEW loads malformed VI data; NI has not disclosed the exact unchecked length operation. Exploitation requires a local user to open the file, after which processing exposes process memory or executes code in that user's context.
The record
- CVE
- CVE-2026-64203
- Published
- Aug 25, 2026
- Updated
- Aug 26, 2026
- Vendor
- National Instruments
- Product
- LabVIEW
- Classifications
- CWE-125, CAPEC-100, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 25, 2026CVE publishedPublication date reported by the CVE source.
- Aug 26, 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.
- Affected versionversion=0 <23.0.0
- Affected versionversion=23.1.0 <23.3.10
- Affected versionversion=24.1.0 <24.3.7
- Affected versionversion=25.1.0 <25.3.5
- Affected versionversion=26.1.0 <26.3.1
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
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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