CVE-2026-45654

HIGHPre-NVD 7.97.9—
EchelonGraph scoreMEDIUM 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
7.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.9Exploit: None knownExposed: 0

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

Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

CVSS v3
7.9
EG Score
7.9(medium)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity79% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

June 9, 2026

Last Modified

August 25, 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 9× in last 7d / 54× 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 345 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-45654?
CVE-2026-45654 is a high vulnerability published on June 9, 2026. Improper access control 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 August 25, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 76.4% of all scored CVEs.
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

Explore →

Is Your Infrastructure Affected by CVE-2026-45654?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs