CVE-2026-50312

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 72% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.8EG
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.

Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
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-2026-50312

Vendor Advisories for CVE-2026-50312(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 34× in last 7d / 166× 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 234 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-50312?
CVE-2026-50312 is a high vulnerability published on July 14, 2026. Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
When was CVE-2026-50312 disclosed?
CVE-2026-50312 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-2026-50312 actively exploited?
CVE-2026-50312 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 72.2% of all scored CVEs.
What is the CVSS score of CVE-2026-50312?
CVE-2026-50312 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-50312?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50312, 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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