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HIGH

CVE-2026-4129

CVSS v3

8.1

HIGH

EPSS Score

0.4 %

exploit probability, as of 2026-09-29

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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 2026 Q3 and prior versions.

Technical details

Published
2026-09-10
Last Modified
2026-09-12

Frequently asked questions

What is CVE-2026-4129?

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 2026 Q3 and prior versions.

Is CVE-2026-4129 actively exploited?

Active exploitation of CVE-2026-4129 has not been confirmed. Its EPSS score was 0.4% on 2026-09-29, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-4129?

CVE-2026-4129 has a CVSS v3 base score of 8.1 (HIGH severity).

Is CVE-2026-4129 affecting your environment?

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