CVE-2026-48138 Out-of-bounds read vulnerability in the NI grpc-device streaming API

What is CVE-2026-48138?

CVE-2026-48138 is a high-severity denial of service vulnerability in NI InstrumentStudio, published on 19 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

There is an out-of-bounds read vulnerability in the NI grpc-device streaming API due to a missing bounds check that may result in a denial of service. Successful exploitation requires an attacker to supply a specially crafted write request. This affects NI grpc-device 2.17.0 and prior versions.

Weakness: CWE-125

Which versions are affected by CVE-2026-48138?

It affects 2 products.

Products include Ni Instrumentstudio, Ni Ni Grpc Device Server.

How do I fix CVE-2026-48138?

No fix has been published for CVE-2026-48138 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-48138 being exploited?

There is no known exploitation of CVE-2026-48138 in the wild and no public exploit code.

Other vulnerabilities in NI InstrumentStudio

• CVE-2026-48137 Untrusted pointer dereference in NI grpc-device sideband streaming API Critical 9.3
• CVE-2026-9142 Insecure Default Credentials vulnerability in NI grpc-device when TLS configuration is not present Critical 9.3
• CVE-2026-48139 NULL pointer dereference vulnerability in NI grpc-device data moniker service High 8.7
• CVE-2026-48140 Unchecked enum cast vulnerability in NI grpc-device in BeginSidebandStream High 7.1
• CVE-2026-9143 Incorrect Conversion between Numeric Types in NI grpc-device due to missing range checks in CodeGen Medium 6.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-8rjh-429j-f6gw.