CVE-2026-18444

Code execution via signed image-size conversion

Published Aug 25, 2026 · Updated Aug 26, 2026

Integer conversion in NI LabVIEW 2026 Q3 and earlier allows context-dependent attackers to execute code through a crafted VI file. During image loading, a signed value is converted to an unsigned value and drives an out-of-bounds read; NI has not identified the parser locus or operand. Exploitation requires a user to open the attacker-supplied VI, after which the process can disclose memory or execute arbitrary code in that user's context.

CVSS severity6.6
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer conversion in NI LabVIEW 2026 Q3 and earlier allows context-dependent attackers to execute code through a crafted VI file. During image loading, a signed value is converted to an unsigned value and drives an out-of-bounds read; NI has not identified the parser locus or operand. Exploitation requires a user to open the attacker-supplied VI, after which the process can disclose memory or execute arbitrary code in that user's context.

The record

CVE
CVE-2026-18444
Published
Aug 25, 2026
Updated
Aug 26, 2026
Vendor
National Instruments
Product
LabVIEW
Classifications
CWE-195, CAPEC-100, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 <23.3.10
  3. Affected versionversion=24.1.0 <24.3.7
  4. Affected versionversion=25.1.0 <25.3.5
  5. Affected versionversion=26.1.0 <26.3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

National Instruments · LabVIEWversion=0 <23.0.0; version=23.1.0 <23.3.10; version=24.1.0 <24.3.7; version=25.1.0 <25.3.5; version=26.1.0 <26.3.1

Published CVSS scores

6.9NICVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
6.6NICVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/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-195Signed to Unsigned Conversion Error
CAPEC-100Overflow Buffers
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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