CVE-2026-48140
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 unchecked enum cast vulnerability in NI grpc-device BeginSidebandStream that may allow an attacker to trigger invalid enum states and undefined behavior, potentially resulting in a denial of service. Successful exploitation requires an attacker to supply a specially crafted message containing an out-of-range value. 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 confidenceThe BeginSidebandStream function in NI grpc-device 2.17.0 and prior versions performs an unchecked enum cast, allowing attackers to supply out-of-range values that trigger invalid enum states and undefined behavior, potentially causing a 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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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Check NI InstrumentStudio versionOpen NI InstrumentStudio and navigate to Help > About, or check the installed version via Windows Add/Remove Programs. Look for the version number.Affected if Version is 2025 or earlier, or version is exactly 2026 (the 2026 release). Versions 2027 and later are not affected.
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Check NI Grpc Device Server versionLocate the NI gRPC Device Server installation. The version is typically listed in the server's executable properties (right-click on nigrpcdeviceserver.exe > Properties > Details), or check the installation directory for version information. If running as a service, check the service details.Affected if Version is earlier than 2.18.0 (including 2.17.0 and all prior versions).
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Identify if both products are presentCheck system for installations of NI InstrumentStudio and NI gRPC Device Server. InstrumentStudio often bundles the gRPC Device Server component.Affected if Either product is installed at a vulnerable version listed above.
Your environment is affected if NI InstrumentStudio version 2025 or earlier/2026, or NI gRPC Device Server version below 2.18.0 is installed and using the BeginSidebandStream function.
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
Upgrade to NI grpc-device version 2.17.1 or later which includes proper enum validation. If upgrade is not immediately possible, implement input validation on enum values before casting.
NI Grpc Device Server >= 2.18.0
- 1. Identify the current version of NI Grpc Device Server installed in your environment
- 2. Download NI Grpc Device Server version 2.18.0 or later from the official NI website (www.ni.com) or GitHub repository
- 3. Stop any running instances of the NI Grpc Device Server
- 4. Install the updated NI Grpc Device Server version 2.18.0 or newer
- 5. Restart the NI Grpc Device Server service
- 6. Verify the service is running correctly and test that BeginSidebandStream functionality is working as expected
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-48140 — 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-2026-48140 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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