{"id":"CVE-2026-4129","title":"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","summary":"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 N…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-862"],"vendor":"NI","product":"SystemLink","affected":["SystemLink <= 26.5.0","systemlink_server <= 26.5.0"],"published":"2026-09-10","updated":"2026-09-16","sourceUpdated":"2026-09-16T17:17:19.210","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-4129","references":[{"url":"https://www.ni.com/en/support/security/available-critical-and-security-updates-for-ni-software/2026/improper-access-controls-in-ni-systemlink.html","label":"security@ni.com"}],"tags":["nvd","cve.org"],"epss":0.00201,"epssPercentile":0.10247,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-11T00:00:00+00:00"},"ingestedAt":"2026-09-14T15:16:39.165Z","slug":"CVE-2026-4129","body":"## Overview\n\nThere 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}