EUVD-2026-38028Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable gRPC RPC (AV:N) with trivial crafted payload (AC:L) requires authenticated low-privileged caller (PR:L), no UI, scope unchanged, availability-only impact from server crash.
Primary rating from Vendor (NI).
CVSS VectorVendor: NI
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
There 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.
AnalysisAI
Denial of service in NI grpc-device 2.17.0 and earlier allows an authenticated remote attacker to crash or destabilize the gRPC server by sending a crafted BeginSidebandStream message containing an out-of-range enum value. The unchecked cast triggers undefined behavior in the server process, with no public exploit identified at time of analysis. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the NI grpc-device server's gRPC listener and low-privileged authentication to invoke the BeginSidebandStream RPC (CVSS PR:L), plus the ability to craft a protobuf message with an integer value outside the declared enum range for the sideband-stream parameter. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector AV:N/AC:L/AT:N/PR:L/UI:N with VA:H and VC:N/VI:N indicates a low-complexity network-reachable denial of service requiring some level of authentication (PR:L), scoring 7.1. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained low-privileged gRPC credentials - for example a shared lab service account or a compromised engineering workstation on the test network - connects to the grpc-device server and issues a BeginSidebandStream call with a protobuf field set to an integer outside the defined enum range. The unchecked cast yields undefined behavior in the server's dispatch logic, crashing the grpc-device process and taking down all instrument control sessions for connected clients. … |
| Remediation | Upgrade NI grpc-device to a version later than 2.17.0 per the NI security bulletin at https://www.ni.com/en/support/security/available-critical-and-security-updates-for-ni-software/2026/multiple-vulnerabilities-in-ni-grpc-device-server.html and the upstream advisory at https://github.com/ni/grpc-device/security/advisories/GHSA-prfr-q8h3-mqxv; the input data lists patch availability but does not pin a single fixed version, so consult those advisories for the exact build to deploy (patch available per vendor advisory). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all systems running NI grpc-device 2.17.0 or earlier and document network access paths to these services. …
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External POC / Exploit Code
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