Improper Access Control in NI SystemLink Affects Host Operating System Files
CVE-2026-4129

8.6HIGH

Key Information:

Vendor

Ni

Status
Systemlink
Systemlink Server
Vendor
CVE Published:
10 September 2026

What is CVE-2026-4129?

An improper access control vulnerability exists in NI SystemLink that may enable authenticated users with limited privileges to gain unauthorized access to host operating system files and directories that should remain protected. This issue poses security risks as it allows for potential exposure of sensitive information, affecting NI SystemLink and the NI SystemLink Server in versions up to and including 2026 Q3.

Affected Version(s)

SystemLink 0 <= 26.5.0

SystemLink Server 0 <= 26.5.0

References

https://www.ni.com/en/support/security/available-critical...

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.