CVE-2026-40456

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.9%, top 41% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.6Exploit: None knownExposed: 0

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

An OS Command Injection vulnerability exists in LMS (LAN Management System) before commit 9fcb4de due to an IP address parameter being passed to the "exec()" function without proper validation, allowing attackers to execute arbitrary operating system commands.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

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
Severity86% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
59%
KEV
Not listed

Published

June 18, 2026

Last Modified

June 22, 2026

Advisory Details (3)

Auto-updated Jun 22, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

LMS - LAN Management System

https://lms.org.pl/
github_commit

commit 9fcb4de19b7d (chilek/lms)

Fix landed in chilek/lms commit 9fcb4de19b7d — awaiting tagged release

https://github.com/chilek/lms/commit/9fcb4de19b7d76394898dbc124252b86b07ac0ed
generic

Podatności w oprogramowaniu LMS | CERT Polska

https://cert.pl/posts/2026/06/CVE-2026-40455

Vendor Advisories for CVE-2026-40456(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 6× in last 7d / 57× 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.

Showing the most recent 100 of 225 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 09:37 UTCEPSS rescore
  3. 2026-09-10 09:34 UTCEPSS rescore
  4. 2026-09-08 22:00 UTCEPSS rescore
  5. 2026-09-07 16:01 UTCEPSS rescore
  6. 2026-09-06 13:47 UTCEPSS rescore
  7. 2026-09-04 05:06 UTCEPSS rescore
  8. 2026-09-02 14:12 UTCEPSS rescore
  9. 2026-09-01 13:53 UTCEPSS rescore
  10. 2026-09-01 04:39 UTCEPSS rescore
  11. 2026-08-30 20:58 UTCEG score recompute
  12. 2026-08-30 20:58 UTCGHSA enrichment
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 01:22 UTCEPSS rescore
  15. 2026-08-28 21:41 UTCEPSS rescore
  16. 2026-08-27 14:25 UTCEPSS rescore
  17. 2026-08-26 14:46 UTCEPSS rescore
  18. 2026-08-25 13:49 UTCEPSS rescore
  19. 2026-08-25 02:51 UTCGHSA enrichment
  20. 2026-08-24 15:03 UTCEG score recompute
  21. 2026-08-24 15:03 UTCGHSA enrichment
  22. 2026-08-24 01:12 UTCGHSA enrichment
  23. 2026-08-23 13:29 UTCGHSA enrichment
  24. 2026-08-23 01:11 UTCEG score recompute
  25. 2026-08-23 01:11 UTCGHSA enrichment
Show 75 more
  1. 2026-08-23 00:19 UTCEPSS rescore
  2. 2026-08-21 23:49 UTCEPSS rescore
  3. 2026-08-21 19:31 UTCGHSA enrichment
  4. 2026-08-21 07:48 UTCEG score recompute
  5. 2026-08-21 07:48 UTCGHSA enrichment
  6. 2026-08-20 22:55 UTCEPSS rescore
  7. 2026-08-20 20:04 UTCGHSA enrichment
  8. 2026-08-20 08:09 UTCEG score recompute
  9. 2026-08-20 08:09 UTCGHSA enrichment
  10. 2026-08-19 17:03 UTCEPSS rescore
  11. 2026-08-19 07:43 UTCEG score recompute
  12. 2026-08-19 07:43 UTCGHSA enrichment
  13. 2026-08-18 13:48 UTCEPSS rescore
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-17 11:59 UTCGHSA enrichment
  16. 2026-08-17 00:16 UTCEG score recompute
  17. 2026-08-17 00:16 UTCGHSA enrichment
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 12:32 UTCEG score recompute
  20. 2026-08-16 12:32 UTCGHSA enrichment
  21. 2026-08-16 02:14 UTCEPSS rescore
  22. 2026-08-16 00:49 UTCGHSA enrichment
  23. 2026-08-15 13:05 UTCEG score recompute
  24. 2026-08-15 13:05 UTCGHSA enrichment
  25. 2026-08-15 01:30 UTCEPSS rescore
  26. 2026-08-15 00:56 UTCGHSA enrichment
  27. 2026-08-14 13:13 UTCGHSA enrichment
  28. 2026-08-14 01:30 UTCEG score recompute
  29. 2026-08-14 01:30 UTCGHSA enrichment
  30. 2026-08-13 22:00 UTCEPSS rescore
  31. 2026-08-13 13:47 UTCGHSA enrichment
  32. 2026-08-13 01:54 UTCGHSA enrichment
  33. 2026-08-12 14:11 UTCEG score recompute
  34. 2026-08-12 14:11 UTCGHSA enrichment
  35. 2026-08-12 13:51 UTCEPSS rescore
  36. 2026-08-12 02:28 UTCGHSA enrichment
  37. 2026-08-11 14:45 UTCEG score recompute
  38. 2026-08-11 14:45 UTCGHSA enrichment
  39. 2026-08-11 13:43 UTCEPSS rescore
  40. 2026-08-11 03:01 UTCEG score recompute
  41. 2026-08-11 03:01 UTCGHSA enrichment
  42. 2026-08-11 00:00 UTCEPSS rescore
  43. 2026-08-10 15:18 UTCGHSA enrichment
  44. 2026-08-10 03:35 UTCGHSA enrichment
  45. 2026-08-09 15:52 UTCEG score recompute
  46. 2026-08-09 15:52 UTCGHSA enrichment
  47. 2026-08-09 13:46 UTCEPSS rescore
  48. 2026-08-09 04:09 UTCEG score recompute
  49. 2026-08-09 04:09 UTCGHSA enrichment
  50. 2026-08-08 16:37 UTCEPSS rescore
  51. 2026-08-08 16:26 UTCGHSA enrichment
  52. 2026-08-08 04:42 UTCGHSA enrichment
  53. 2026-08-07 16:59 UTCEG score recompute
  54. 2026-08-07 16:59 UTCGHSA enrichment
  55. 2026-08-07 05:16 UTCGHSA enrichment
  56. 2026-08-06 17:33 UTCEG score recompute
  57. 2026-08-06 17:33 UTCGHSA enrichment
  58. 2026-08-06 13:46 UTCEPSS rescore
  59. 2026-08-06 05:49 UTCEG score recompute
  60. 2026-08-06 05:49 UTCGHSA enrichment
  61. 2026-08-05 19:17 UTCEPSS rescore
  62. 2026-08-05 18:06 UTCGHSA enrichment
  63. 2026-08-05 03:45 UTCGHSA enrichment
  64. 2026-08-04 15:23 UTCEG score recompute
  65. 2026-08-04 15:23 UTCGHSA enrichment
  66. 2026-08-04 15:10 UTCEPSS rescore
  67. 2026-08-04 10:38 UTCEPSS rescore
  68. 2026-08-03 20:27 UTCEG score recompute
  69. 2026-08-03 20:27 UTCGHSA enrichment
  70. 2026-08-03 10:36 UTCEPSS rescore
  71. 2026-08-03 08:44 UTCGHSA enrichment
  72. 2026-08-02 20:47 UTCGHSA enrichment
  73. 2026-08-02 09:04 UTCEG score recompute
  74. 2026-08-02 09:04 UTCGHSA enrichment
  75. 2026-08-02 02:27 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-40456?
CVE-2026-40456 is a high vulnerability published on June 18, 2026. An OS Command Injection vulnerability exists in LMS (LAN Management System) before commit 9fcb4de due to an IP address parameter being passed to the "exec()" function without proper validation, allowing attackers to execute arbitrary operating system commands.
When was CVE-2026-40456 disclosed?
CVE-2026-40456 was first published in the National Vulnerability Database on June 18, 2026, with the most recent update on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40456 actively exploited?
CVE-2026-40456 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 40.9% of all scored CVEs.
What is the CVSS score of CVE-2026-40456?
CVE-2026-40456 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-40456?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40456, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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