CVE-2026-50447

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-14. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over a network.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
59%
KEV
Not listed

Published

July 14, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 28, 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-2026-50447

Vendor Advisories for CVE-2026-50447(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 58× in last 7d / 337× 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 454 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-50447?
CVE-2026-50447 is a critical vulnerability published on July 14, 2026. Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
When was CVE-2026-50447 disclosed?
CVE-2026-50447 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50447 actively exploited?
CVE-2026-50447 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 40.9% of all scored CVEs.
What is the CVSS score of CVE-2026-50447?
CVE-2026-50447 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-50447?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50447, 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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