CVE-2026-68820

CRITICALPre-NVD 7.09.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-08-11), indicating real-world exploitation has been confirmed by US federal agencies. the CNA's CVSS baseline 7.0 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, cna:microsoft, epss, ghsa
Trending — KEV-added this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 0%CVSS: 7.0Exploit: cisa kev · ssvc activeExposed: 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
7.0
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
26%
KEV
⚠ Exploited

Published

August 11, 2026

Last Modified

August 20, 2026

Advisory Details (1)

Auto-updated Aug 11, 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-2026-68820

Vendor Advisories for CVE-2026-68820(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 147× in last 7d / 213× 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 213 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2026-68820?
CVE-2026-68820 is a critical vulnerability published on August 11, 2026. Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
When was CVE-2026-68820 disclosed?
CVE-2026-68820 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68820 actively exploited?
Yes. CISA added CVE-2026-68820 to the Known Exploited Vulnerabilities catalog on August 11, 2026, affecting Microsoft Windows Ancillary Function Driver for WinSock . KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-68820?
CVE-2026-68820 has a CVSS v4.0 base score of 7.0 (CNA self-assessment; NVD's own analysis pending). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2026-68820?
CVE-2026-68820 affects Microsoft Windows Ancillary Function Driver for WinSock . The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2026-68820?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68820, 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.

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