Medium severity · published Jun 19, 2026
CVE-2026-48140
Unchecked enum cast vulnerability in NI grpc-device in BeginSidebandStream
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IN
InstrumentStudio · NI
through 26.3.0 · source: vendor, NVD
GR
grpc-device · NI
through 2.17.0 · source: vendor
NG
NI Grpc Device Server · NI
before 2.18.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48140
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-48140
Vendor Advisory
https://github.com/ni/grpc-device/security/advisories/GHSA-prfr-q8h3-mqxv
Vendor Advisory
https://www.ni.com/en/support/security/available-critical-and-security-updates-for-ni-software/2026/multiple-vulnerabilities-in-ni-grpc-device-server.html
More from grpc-device
9.8
CVE-2026-48137
Untrusted pointer dereference in NI grpc-device sideband streaming API
9.1
CVE-2026-9142
Insecure Default Credentials vulnerability in NI grpc-device when TLS configuration is not present
7.5
CVE-2026-48141
Memory leak in NI grpc-device BeginSidebandStream
7.5
CVE-2026-48139
NULL pointer dereference vulnerability in NI grpc-device data moniker service
7.5
CVE-2026-48138
Out-of-bounds read vulnerability in the NI grpc-device streaming API