CVE-2026-42909

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

Concurrent execution using shared resource with improper synchronization ('race condition') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 28, 2026

Advisory Details (1)

Auto-updated Jun 10, 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-2026-42909

Vendor Advisories for CVE-2026-42909(2)

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

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 98× 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 192 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-42909?
CVE-2026-42909 is a high vulnerability published on June 9, 2026. Concurrent execution using shared resource with improper synchronization ('race condition') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
When was CVE-2026-42909 disclosed?
CVE-2026-42909 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42909 actively exploited?
CVE-2026-42909 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 67.6% of all scored CVEs.
What is the CVSS score of CVE-2026-42909?
CVE-2026-42909 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-42909?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42909, 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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