CVE-2026-56188

CRITICALNVD 8.19.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-14. NVD baseline CVSS 8.1; sources differ by 1.7.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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: 8.1Exploit: 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 Windows Server Network driver allows an unauthorized attacker to execute code over a network.

CVSS v3
8.1
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
46%
KEV
Not listed

Published

July 14, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Jul 22, 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-2026-56188

Vendor Advisories for CVE-2026-56188(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 61× in last 7d / 365× 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 496 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-56188?
CVE-2026-56188 is a critical vulnerability published on July 14, 2026. Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Server Network driver allows an unauthorized attacker to execute code over a network.
When was CVE-2026-56188 disclosed?
CVE-2026-56188 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-2026-56188 actively exploited?
CVE-2026-56188 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 53.6% of all scored CVEs.
What is the CVSS score of CVE-2026-56188?
CVE-2026-56188 has a CVSS v3 base score of 8.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2026-56188?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56188, 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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