CVE-2026-45595

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-06-09. the CNA's CVSS baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: 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 Mark of the Web (MOTW) allows an unauthorized attacker to bypass a security feature over a network.

CVSS v3
5.4
EG Score
5.4(high)
EPSS
34.1%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 1, 2026

Advisory Details (1)

Auto-updated Jun 16, 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-2026-45595

Vendor Advisories for CVE-2026-45595(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 21× in last 7d / 101× 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 101 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-45595?
CVE-2026-45595 is a medium vulnerability published on June 9, 2026. Protection mechanism failure in Windows Mark of the Web (MOTW) allows an unauthorized attacker to bypass a security feature over a network.
When was CVE-2026-45595 disclosed?
CVE-2026-45595 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-2026-45595 actively exploited?
CVE-2026-45595 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45595?
CVE-2026-45595 has a CVSS v4.0 base score of 5.4 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-45595?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45595, 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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