CVE-2026-48138
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThere 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThis is an out-of-bounds read vulnerability in the NI grpc-device streaming API caused by a missing bounds check. An attacker can exploit this by sending a specially crafted write request, leading to an out-of-bounds memory read that can cause denial of service.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 2025= 2026< 2.18.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed NI InstrumentStudio versionOpen InstrumentStudio and navigate to Help > About, or check the installed programs list in Windows Settings to locate the version number of NI InstrumentStudio.Affected if The installed version is 2025 or earlier, or exactly version 2026.
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Identify installed NI Grpc Device Server versionCheck the version of the NI Grpc Device Server installed on the system. This can typically be found in the program files directory for NI software, or by running 'grpc-device-server --version' if the command-line tool is available.Affected if The installed version is earlier than 2.18.0.
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Verify grpc-device server is runningCheck if the NI Grpc Device Server service or process is active on the system. This can be done via Windows Services, Task Manager, or by querying for processes named 'grpc-device-server' or similar.Affected if The server is running and accepting streaming API requests.
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Confirm streaming API is exposedReview the grpc-device server configuration to determine if the streaming API write endpoint is enabled and accessible. Check configuration files or server logs for streaming-related endpoints.Affected if The streaming write API endpoint is enabled and reachable on the network.
A system is affected if it runs Ni InstrumentStudio version 2025 or earlier, or exactly version 2026, OR runs NI Grpc Device Server version earlier than 2.18.0, with the grpc-device server active and streaming API accessible.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped2.18.0
Implement proper bounds checking in the streaming API write request handler to validate buffer sizes before memory access. Upgrade to a version after 2.17.0 if a patched release is available.
Ni Grpc Device Server 2.18.0 or later
- Upgrade NI Grpc Device Server to version 2.18.0 or later
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-48138 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-48138 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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