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NVD / CVE Program· CNA NI

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

HighCVSS 8.5 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 34/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No special conditions are required; it is repeatable.
  • Fixed version: NI LabVIEW 23.0.0, 23.3.9, 24.3.6.

Low priority for now. Upgrade to NI LabVIEW 23.0.0, 23.3.9, 24.3.6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Apr 7, 2026
Updated
Jul 24, 2026
EPSS
0.2% · 13th percentile

Report tools

JSON

Action score

34

Monitor

Low priority for now.

CVSS
34 / 40 · 8.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · NI
7.8
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-32861

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
nilabview

Versions reported by the vendor

Affected version ranges reported by the assigning authority (NI). Independent of NVD's CPE analysis and usually ahead of it.

  • NI LabVIEW

    • before 23.0.0affected · semver
    • 23.1.0 and later · before 23.3.9affected · semver
    • 24.1.0 and later · before 24.3.6affected · semver
    • 25.1.0 and later · before 25.3.4affected · semver
    • 26.1.0 and later · before 26.1.1affected · semver
Affected versions · NVD (5)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • ni labviewup to 2022 inclusive
  • ni labview2023
  • ni labview2024
  • ni labview2025
  • ni labview2026

Same product

ni: all records

Other highest-scoring records for the same primary product.

  • CVE-2013-5022Absolute path traversal vulnerability in the 3D Graph ActiveX control in cw3dgrph.ocx in National Instruments LabWindows/CVI 2012 SP1 and…
    41Plan
  • CVE-2013-5021Multiple absolute path traversal vulnerabilities in National Instruments cwui.ocx, as used in National Instruments LabWindows/CVI 2012 SP1…
    38Monitor
  • CVE-2025-7848Missing input check in lvpict.cpp used in NI LabVIEW
    36Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-64469Dec 18, 2025 · Stack-based Buffer Overflow in LVResource::DetachResource() in NI LabVIEW
    34Monitor
  • ← EarlierCVE-2026-32860Apr 7, 2026 · Out-of-Bounds Write Vulnerability in NI LabVIEW when loading lvlib file
    34Monitor
  • Later →CVE-2026-32862Apr 7, 2026 · Out-of-Bounds Write in ResFileFactory::InitResourceMgr()
    34Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
NI LabVIEW23.0.0Vendor (CNA)
NI LabVIEW23.3.9Vendor (CNA)
NI LabVIEW24.3.6Vendor (CNA)
NI LabVIEW25.3.4Vendor (CNA)
NI LabVIEW26.1.1Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-328600 days apartOut-of-Bounds Write Vulnerability in NI LabVIEW when loading lvlib file
    34Monitor
  • CVE-2026-328620 days apartOut-of-Bounds Write in ResFileFactory::InitResourceMgr()
    34Monitor
  • CVE-2025-64461110 days apartOut of Bounds Write in mgocre_SH_25_3!RevBL() in NI LabVIEW
    34Monitor
  • CVE-2026-16233140 days apartOut-of-Bounds Write Vulnerability in NI LabVIEW when loading VI
    34Monitor
  • CVE-2026-64204140 days apartOut-of-Bounds Write Vulnerability in NI LabVIEW when loading VI
    34Monitor
  • CVE-2025-2632363 days apartOut of Bounds Write Vulnerability in NI LabVIEW reading CPU info from cache
    34Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
P
Scope
X

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records