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 43% 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
Trending — 3 sources updated this week
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.6Exploit: NoneExposed: 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)
EPSS
56.9%
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 36× in last 7d / 84× 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. 2026-07-06 19:03 UTCEG score recompute
  2. 2026-07-06 19:03 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 07:02 UTCEG score recompute
  6. 2026-07-06 07:02 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 19:18 UTCEG score recompute
  10. 2026-07-05 19:18 UTCGHSA enrichment
  11. 2026-07-05 07:35 UTCEG score recompute
  12. 2026-07-05 07:35 UTCGHSA enrichment
  13. 2026-07-05 02:30 UTCEPSS rescore
  14. 2026-07-04 19:36 UTCEG score recompute
  15. 2026-07-04 19:35 UTCGHSA enrichment
  16. 2026-07-04 07:52 UTCEG score recompute
  17. 2026-07-04 07:52 UTCGHSA enrichment
  18. 2026-07-04 06:31 UTCEPSS rescore
  19. 2026-07-03 19:22 UTCEG score recompute
  20. 2026-07-03 19:22 UTCGHSA enrichment
  21. 2026-07-03 07:39 UTCEG score recompute
  22. 2026-07-03 07:39 UTCGHSA enrichment
  23. 2026-07-02 19:56 UTCEG score recompute
  24. 2026-07-02 19:56 UTCGHSA enrichment
  25. 2026-07-02 08:13 UTCEG score recompute
Show 59 more
  1. 2026-07-02 08:13 UTCGHSA enrichment
  2. 2026-07-01 20:29 UTCEG score recompute
  3. 2026-07-01 20:29 UTCGHSA enrichment
  4. 2026-07-01 15:06 UTCEPSS rescore
  5. 2026-07-01 08:46 UTCEG score recompute
  6. 2026-07-01 08:45 UTCGHSA enrichment
  7. 2026-06-30 23:22 UTCEPSS rescore
  8. 2026-06-30 21:02 UTCEG score recompute
  9. 2026-06-30 21:01 UTCGHSA enrichment
  10. 2026-06-30 09:17 UTCEG score recompute
  11. 2026-06-30 09:17 UTCGHSA enrichment
  12. 2026-06-29 21:34 UTCEG score recompute
  13. 2026-06-29 21:34 UTCGHSA enrichment
  14. 2026-06-29 09:51 UTCEG score recompute
  15. 2026-06-29 09:51 UTCGHSA enrichment
  16. 2026-06-28 22:08 UTCEG score recompute
  17. 2026-06-28 22:08 UTCGHSA enrichment
  18. 2026-06-28 14:07 UTCEPSS rescore
  19. 2026-06-28 10:25 UTCEG score recompute
  20. 2026-06-28 10:25 UTCGHSA enrichment
  21. 2026-06-28 04:56 UTCEPSS rescore
  22. 2026-06-27 22:36 UTCEG score recompute
  23. 2026-06-27 22:36 UTCGHSA enrichment
  24. 2026-06-27 10:52 UTCEG score recompute
  25. 2026-06-27 10:52 UTCGHSA enrichment
  26. 2026-06-27 03:08 UTCEPSS rescore
  27. 2026-06-26 23:08 UTCEG score recompute
  28. 2026-06-26 23:08 UTCGHSA enrichment
  29. 2026-06-26 11:25 UTCEG score recompute
  30. 2026-06-26 11:25 UTCGHSA enrichment
  31. 2026-06-25 18:56 UTCEG score recompute
  32. 2026-06-25 18:56 UTCGHSA enrichment
  33. 2026-06-25 13:49 UTCEPSS rescore
  34. 2026-06-25 13:49 UTCEPSS rescore
  35. 2026-06-25 07:13 UTCEG score recompute
  36. 2026-06-25 07:12 UTCGHSA enrichment
  37. 2026-06-24 19:26 UTCEG score recompute
  38. 2026-06-24 19:26 UTCGHSA enrichment
  39. 2026-06-24 14:05 UTCEPSS rescore
  40. 2026-06-24 06:53 UTCEG score recompute
  41. 2026-06-24 06:53 UTCGHSA enrichment
  42. 2026-06-23 21:33 UTCEPSS rescore
  43. 2026-06-23 19:10 UTCEG score recompute
  44. 2026-06-23 19:10 UTCGHSA enrichment
  45. 2026-06-23 07:26 UTCEG score recompute
  46. 2026-06-23 07:26 UTCGHSA enrichment
  47. 2026-06-22 19:38 UTCEG score recompute▲ 8.60
  48. 2026-06-22 19:38 UTCGHSA enrichment
  49. 2026-06-22 19:37 UTCNVD updateCVSS v3 → 8.6 · CVSS v4 → 8.6
  50. 2026-06-22 14:25 UTCEPSS rescore
  51. 2026-06-22 14:25 UTCEPSS rescore
  52. 2026-06-21 21:40 UTCEG score recompute
  53. 2026-06-21 21:39 UTCGHSA enrichment
  54. 2026-06-21 14:56 UTCEPSS rescore
  55. 2026-06-21 14:56 UTCEPSS rescore
  56. 2026-06-21 01:59 UTCEPSS rescore
  57. 2026-06-19 19:25 UTCEPSS rescore
  58. 2026-06-18 15:45 UTCEG score recompute
  59. 2026-06-18 15:45 UTCGHSA enrichment

Related CVEs(same CWE)

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 56.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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.

Dependency Blast Radius

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