CVE-2026-4129

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-10. A secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.1Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

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.

CVSS v3
8.1
EG Score
8.1HIGHhigh confidence
EG Risk
37
EG Risk 37/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
26th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 10, 2026

Last Modified

September 16, 2026

Advisory Details (1)

Auto-updated Sep 10, 2026
No patch confirmed yet.
generic

Improper Access Controls in NI SystemLink - NI

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

Vendor Advisories for CVE-2026-4129(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 26× in last 7d / 99× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-04 11:41 UTCGHSA enrichment
  2. 2026-10-04 00:17 UTCEG score recompute
  3. 2026-10-04 00:17 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 12:09 UTCGHSA enrichment
  6. 2026-10-03 00:11 UTCEG score recompute
  7. 2026-10-03 00:11 UTCGHSA enrichment
  8. 2026-10-02 12:36 UTCGHSA enrichment
  9. 2026-10-02 00:23 UTCEG score recompute
  10. 2026-10-02 00:23 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-10-01 12:45 UTCGHSA enrichment
  13. 2026-10-01 01:22 UTCEG score recompute
  14. 2026-10-01 01:22 UTCGHSA enrichment
  15. 2026-09-30 15:03 UTCEPSS rescore
  16. 2026-09-30 14:00 UTCGHSA enrichment
  17. 2026-09-30 01:56 UTCEG score recompute
  18. 2026-09-30 01:56 UTCGHSA enrichment
  19. 2026-09-29 07:44 UTCEG score recompute
  20. 2026-09-29 07:44 UTCGHSA enrichment
  21. 2026-09-28 20:21 UTCEG score recompute
  22. 2026-09-28 20:21 UTCGHSA enrichment
  23. 2026-09-28 13:51 UTCEPSS rescore
  24. 2026-09-28 07:44 UTCGHSA enrichment
  25. 2026-09-27 20:21 UTCEG score recompute
Show 74 more
  1. 2026-09-27 20:21 UTCGHSA enrichment
  2. 2026-09-27 13:48 UTCEPSS rescore
  3. 2026-09-27 08:58 UTCGHSA enrichment
  4. 2026-09-26 21:36 UTCEG score recompute
  5. 2026-09-26 21:36 UTCGHSA enrichment
  6. 2026-09-26 15:59 UTCEPSS rescore
  7. 2026-09-26 10:12 UTCEG score recompute
  8. 2026-09-26 10:11 UTCGHSA enrichment
  9. 2026-09-26 00:27 UTCEPSS rescore
  10. 2026-09-25 22:45 UTCGHSA enrichment
  11. 2026-09-25 10:58 UTCGHSA enrichment
  12. 2026-09-24 23:09 UTCEG score recompute
  13. 2026-09-24 23:09 UTCGHSA enrichment
  14. 2026-09-24 11:19 UTCGHSA enrichment
  15. 2026-09-23 23:56 UTCEG score recompute
  16. 2026-09-23 23:56 UTCGHSA enrichment
  17. 2026-09-23 17:53 UTCEPSS rescore
  18. 2026-09-23 12:34 UTCGHSA enrichment
  19. 2026-09-23 01:10 UTCEG score recompute
  20. 2026-09-23 01:10 UTCGHSA enrichment
  21. 2026-09-22 13:46 UTCGHSA enrichment
  22. 2026-09-22 02:23 UTCEG score recompute
  23. 2026-09-22 02:23 UTCGHSA enrichment
  24. 2026-09-21 15:00 UTCGHSA enrichment
  25. 2026-09-21 03:31 UTCEG score recompute
  26. 2026-09-21 03:31 UTCGHSA enrichment
  27. 2026-09-20 20:16 UTCEPSS rescore
  28. 2026-09-20 16:09 UTCGHSA enrichment
  29. 2026-09-20 04:43 UTCGHSA enrichment
  30. 2026-09-19 17:20 UTCEG score recompute
  31. 2026-09-19 17:20 UTCGHSA enrichment
  32. 2026-09-19 05:58 UTCEG score recompute
  33. 2026-09-19 05:57 UTCGHSA enrichment
  34. 2026-09-18 19:28 UTCEPSS rescore
  35. 2026-09-18 18:35 UTCGHSA enrichment
  36. 2026-09-18 07:10 UTCGHSA enrichment
  37. 2026-09-17 19:47 UTCEG score recompute
  38. 2026-09-17 19:47 UTCGHSA enrichment
  39. 2026-09-17 05:15 UTCGHSA enrichment
  40. 2026-09-16 17:52 UTCEG score recompute
  41. 2026-09-16 17:51 UTCGHSA enrichment
  42. 2026-09-16 16:56 UTCEG score recompute
  43. 2026-09-16 16:56 UTCGHSA enrichment
  44. 2026-09-16 14:08 UTCEPSS rescore
  45. 2026-09-16 10:44 UTCEG score recompute
  46. 2026-09-16 10:44 UTCGHSA enrichment
  47. 2026-09-16 05:15 UTCEPSS rescore
  48. 2026-09-15 23:22 UTCGHSA enrichment
  49. 2026-09-15 11:59 UTCEG score recompute
  50. 2026-09-15 11:59 UTCGHSA enrichment
  51. 2026-09-15 00:36 UTCGHSA enrichment
  52. 2026-09-14 13:14 UTCGHSA enrichment
  53. 2026-09-14 01:51 UTCEG score recompute
  54. 2026-09-14 01:51 UTCGHSA enrichment
  55. 2026-09-13 16:47 UTCEPSS rescore
  56. 2026-09-13 14:28 UTCGHSA enrichment
  57. 2026-09-13 03:06 UTCGHSA enrichment
  58. 2026-09-12 15:43 UTCEG score recompute
  59. 2026-09-12 15:43 UTCGHSA enrichment
  60. 2026-09-12 04:20 UTCEG score recompute
  61. 2026-09-12 04:20 UTCGHSA enrichment
  62. 2026-09-12 03:59 UTCEG score recompute
  63. 2026-09-12 03:59 UTCGHSA enrichment
  64. 2026-09-11 18:45 UTCEG score recompute
  65. 2026-09-11 18:45 UTCGHSA enrichment
  66. 2026-09-11 14:53 UTCEPSS rescore
  67. 2026-09-11 07:22 UTCGHSA enrichment
  68. 2026-09-10 19:59 UTCEG score recompute
  69. 2026-09-10 19:59 UTCGHSA enrichment
  70. 2026-09-10 17:20 UTCEG score recompute
  71. 2026-09-10 16:50 UTCEG score recompute
  72. 2026-09-10 16:20 UTCEG score recompute
  73. 2026-09-10 15:40 UTCEG score recompute
  74. 2026-09-10 15:39 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-4129?
CVE-2026-4129 is a high vulnerability published on September 10, 2026. 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…
When was CVE-2026-4129 disclosed?
CVE-2026-4129 was first published on September 10, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4129 actively exploited?
CVE-2026-4129 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-4129?
CVE-2026-4129 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-4129?
No fix for CVE-2026-4129 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-4129 are linked in the Vendor Advisories panel on this page.

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