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CVE-2026-4129

Improper Access Controls in NI SystemLink

CVSS 3.1 8.1 HIGHCVSS 4.0 8.6 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-4129

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-4129

Published

SystemLink

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "NI",
                    "product": "SystemLink",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "26.5.0",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

SystemLink Server

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "NI",
                    "product": "SystemLink Server",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "26.5.0",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON