CVE-2026-45641

HIGHNVD 7.88.4▲
EchelonGraph scoreMEDIUM confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. NVD baseline CVSS 7.8; sources differ by 0.6.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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

Access of resource using incompatible type ('type confusion') in Windows Hyper-V allows an unauthorized attacker to execute code locally.

CVSS v3
7.8
EG Score
8.4(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity84% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
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-2026-45641

Vendor Advisories for CVE-2026-45641(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 29× in last 7d / 131× 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 314 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-45641?
CVE-2026-45641 is a high vulnerability published on June 9, 2026. Access of resource using incompatible type ('type confusion') in Windows Hyper-V allows an unauthorized attacker to execute code locally.
When was CVE-2026-45641 disclosed?
CVE-2026-45641 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-2026-45641 actively exploited?
CVE-2026-45641 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 77.1% of all scored CVEs.
What is the CVSS score of CVE-2026-45641?
CVE-2026-45641 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.4.
How do I remediate CVE-2026-45641?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45641, 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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