CVE-2026-45654

HIGHPre-NVD 7.97.9—
EchelonGraph scoreHIGH confidence

Score 7.9 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. the CNA's CVSS baseline 7.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
7.9
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.9Exploit: NoneExposed: 0

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

Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

CVSS v3
7.9
EG Score
7.9(high)
EPSS
22.6%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 1, 2026

Advisory Details (1)

Auto-updated Jun 9, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654

Vendor Advisories for CVE-2026-45654(2)

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 38× in last 7d / 183× 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 183 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-45654?
CVE-2026-45654 is a high vulnerability published on June 9, 2026. Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
When was CVE-2026-45654 disclosed?
CVE-2026-45654 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45654 actively exploited?
CVE-2026-45654 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 22.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45654?
CVE-2026-45654 has a CVSS v4.0 base score of 7.9 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-45654?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45654, 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

Explore the affected products and dependency analysis for CVE-2026-45654

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