Vulnerability-Lookup

CVE-2026-4129 (GCVE-0-2026-4129)

Vulnerability from cvelistv5 – Published: 2026-09-10 15:37 – Updated: 2026-09-12 03:55

Title

Improper Access Controls in NI SystemLink

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 NI SystemLink and NI SystemLink Server 2026 Q3 and prior versions.

Severity

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

8.6 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-11 00:00 UTC

CWE

CWE-862 - Missing Authorization

Assigner

NI mitre root

References

1 reference

URL	Tags
https://www.ni.com/en/support/security/available-…

Impacted products

2 products

Vendor	Product	Version	CPE status
NI	SystemLink	Affected: 0 , ≤ 26.5.0 (semver) cpe:2.3:a:ni:systemlink::::::::
NI	SystemLink Server	Affected: 0 , ≤ 26.5.0 (semver) cpe:2.3:a:ni:systemlink_server::::::::

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-4129

Vulnerability from fkie_nvd - Published: 2026-09-10 16:17 - Updated: 2026-09-12 04:16

Severity

8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Summary

References

	URL	Tags
	security@ni.com	https://www.ni.com/en/support/security/available-critical-and-security-updates-for-ni-software/2026/improper-access-controls-in-ni-systemlink.html

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "SystemLink",
          "vendor": "NI",
          "versions": [
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  "lastModified": "2026-09-12T04:16:36.557",
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        "impactScore": 5.2,
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}

GHSA-F777-XF39-R6FM

Vulnerability from github – Published: 2026-09-10 18:31 – Updated: 2026-09-10 18:31

Details

Severity

8.1 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

8.6 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
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  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-10T16:17:14Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-f777-xf39-r6fm",
  "modified": "2026-09-10T18:31:44Z",
  "published": "2026-09-10T18:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4129"
    },
    {
      "type": "WEB",
      "url": "https://www.ni.com/en/support/security/available-critical-and-security-updates-for-ni-software/2026/improper-access-controls-in-ni-systemlink.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-4129 (GCVE-0-2026-4129)

FKIE_CVE-2026-4129

GHSA-F777-XF39-R6FM

Tags

Sightings

Nomenclature