CVE-2026-9143Network attack vector

Data alteration via unchecked size conversion

Published Jun 19, 2026 · Updated Jun 19, 2026

Incorrect numeric conversion in NI gRPC Device Server 2.17.0 and earlier allows remote attackers to alter data through oversized size values. CodeGen converts a size value to a narrower target numeric type without checking its range, silently discarding high-order bits; the same component is included in affected InstrumentStudio releases. Exploitation requires a crafted value exceeding the target type's range, and the disclosed consequence is silent truncation and resulting data alteration.

CVSS severity6.3
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect numeric conversion in NI gRPC Device Server 2.17.0 and earlier allows remote attackers to alter data through oversized size values. CodeGen converts a size value to a narrower target numeric type without checking its range, silently discarding high-order bits; the same component is included in affected InstrumentStudio releases. Exploitation requires a crafted value exceeding the target type's range, and the disclosed consequence is silent truncation and resulting data alteration.

The record

CVE
CVE-2026-9143
Published
Jun 19, 2026
Updated
Jun 19, 2026
Vendor
National Instruments
Product
InstrumentStudio
Classifications
CWE-681, T1565.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 19, 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 <=26.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

National Instruments · InstrumentStudioversion=0 <=26.3.0
National Instruments · NI gRPC Device Serverversion=0 <=2.17.0

Published CVSS scores

7.1National Instruments security bulletinCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
6.3National InstrumentsCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.7National Instruments CNACVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

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.

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No observations available

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

Weakness, pattern, technique

CWE-681Incorrect Conversion between Numeric Types
T1565.002Transmitted Data Manipulation

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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