CVE-2026-50300

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-14. the CNA's CVSS baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

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

Integer underflow (wrap or wraparound) in Windows Kernel allows an authorized attacker to disclose information locally.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

July 14, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Jul 15, 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-2026-50300

Vendor Advisories for CVE-2026-50300(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 23× in last 7d / 110× 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 166 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-50300?
CVE-2026-50300 is a medium vulnerability published on July 14, 2026. Integer underflow (wrap or wraparound) in Windows Kernel allows an authorized attacker to disclose information locally.
When was CVE-2026-50300 disclosed?
CVE-2026-50300 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-2026-50300 actively exploited?
CVE-2026-50300 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 66.5% of all scored CVEs.
What is the CVSS score of CVE-2026-50300?
CVE-2026-50300 has a CVSS v4.0 base score of 5.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-50300?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50300, 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-2026-50300

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