Vulnerability · Published Sep 10, 2026 · Assigned by NI
CVE-2026-4129Improper Access Controls in NI SystemLink
High 8.1
In plain English
A high-severity missing authorization in SystemLink from NI. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.4%top 71.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
There is an improper access control vulnerability in NI SystemLink that may allow an authenticated user with limited privileges to access host operating system files and directories that should be restricted. This vulnerability affects NI SystemLink and NI SystemLink Server versions prior to 2026 Q3.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| NI | SystemLink | 0 – before 26.5.0 |
| NI | SystemLink Server | 0 – before 26.5.0 |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N