CVE-2026-56186

HIGHNVD 6.58.1▲
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-14. NVD baseline CVSS 6.5; sources differ by 1.6.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
8.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.5Exploit: None knownExposed: 0

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

Out-of-bounds read in Windows Schannel allows an authorized attacker to disclose information over a network.

CVSS v3
6.5
EG Score
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity81% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
63%
KEV
Not listed

Published

July 14, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Jul 14, 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-2026-56186

Vendor Advisories for CVE-2026-56186(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 237 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-56186?
CVE-2026-56186 is a high vulnerability published on July 14, 2026. Out-of-bounds read in Windows Schannel allows an authorized attacker to disclose information over a network.
When was CVE-2026-56186 disclosed?
CVE-2026-56186 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-2026-56186 actively exploited?
CVE-2026-56186 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 37.0% of all scored CVEs.
What is the CVSS score of CVE-2026-56186?
CVE-2026-56186 has a CVSS v3 base score of 6.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.1.
How do I remediate CVE-2026-56186?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56186, 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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