CVE-2026-8637

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-10. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

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

A potential uncontrolled search path vulnerability was reported in the LanSchool Classic client application that could allow a local authenticated user to execute arbitrary code with elevated privileges.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
3.0%
KEV
Not listed

Published

June 10, 2026

Last Modified

June 10, 2026

References (1)

Vendor Advisories for CVE-2026-8637(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 9× in last 7d / 69× 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 119 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-8637?
CVE-2026-8637 is a high vulnerability published on June 10, 2026. A potential uncontrolled search path vulnerability was reported in the LanSchool Classic client application that could allow a local authenticated user to execute arbitrary code with elevated privileges.
When was CVE-2026-8637 disclosed?
CVE-2026-8637 was first published in the National Vulnerability Database on June 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8637 actively exploited?
CVE-2026-8637 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8637?
CVE-2026-8637 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-8637?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8637, 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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