# CVE-2026-48139: NI grpc-device NULL pointer dereference in data moniker service

Source: https://junglewise.ai/threats/cve-2026-48139-ni-grpc-device-null-pointer-dereference-in-data-moniker-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-19. Updated: 2026-06-21  
License: CC BY 4.0 with a link back

CVE-2026-48139 · Severity: high · CVSS 7.5 · Published 2026-06-19

NI grpc-device is a software component used to interface with test and measurement hardware. A flaw in its data moniker service allows a remote attacker to crash the software by sending a specific malformed value. This results in a denial-of-service condition, potentially interrupting automated testing or industrial monitoring processes.

Technologies: [NI Grpc-Device](https://junglewise.ai/threats/technologies/grpc-device), [NI InstrumentStudio](https://junglewise.ai/threats/technologies/instrumentstudio). Vendors: [NI](https://junglewise.ai/threats/vendors/ni).

## Quick answers

**Is CVE-2026-48139 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-48139 being exploited in the wild.

**How severe is CVE-2026-48139?** High severity, with a CVSS score of 7.5, published 19 June 2026.

**Which products and versions are affected?** NI Grpc-Device <= 2.17.0; NI InstrumentStudio <= 26.3.0.

**Is there a fix for CVE-2026-48139?** A patch was published on 2026-06-19: Fixed in version 2.18.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-48139 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-48139?** Check whether you run NI Grpc-Device or NI InstrumentStudio at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A NULL pointer dereference (CWE-476) exists in the data moniker service of NI grpc-device versions 2.17.0 and prior. The vulnerability is triggered when the service receives an unexpected or 'unknown' value, leading to an application crash. The attack can be executed over the network without authentication or user interaction. Successful exploitation results in a complete loss of availability for the device interface service. The issue is resolved in NI grpc-device version 2.18.0.

## Affected products

- NI grpc-device <= 2.17.0
- NI InstrumentStudio <= 26.3.0

## Timeline

- 2026-06-19: disclosed
- 2026-06-19: advisory
- 2026-06-19: patched: Fixed in version 2.18.0

## References

- [https://github.com/ni/grpc-device/security/advisories/GHSA-7vg9-5c74-289x](https://github.com/ni/grpc-device/security/advisories/GHSA-7vg9-5c74-289x)
- [https://www.ni.com/en/support/security/available-critical-and-security-updates-for-ni-software/2026/multiple-vulnerabilities-in-ni-grpc-device-server.html](https://www.ni.com/en/support/security/available-critical-and-security-updates-for-ni-software/2026/multiple-vulnerabilities-in-ni-grpc-device-server.html)

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