CVE-2026-67643

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.9%, top 42% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: cna:microsoft, epss, ghsa
Trending — 5 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: 9.8Exploit: None knownExposed: 0

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

Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
58%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 18, 2026

Advisory Details (1)

Auto-updated Sep 18, 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-2026-67643

Vendor Advisories for CVE-2026-67643(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 82× in last 7d / 127× 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 127 total refreshes for this CVE.

  1. 2026-09-21 07:49 UTCVendor advisory
  2. 2026-09-21 07:49 UTCGHSA enrichment
  3. 2026-09-21 03:42 UTCVendor advisory
  4. 2026-09-21 03:42 UTCGHSA enrichment
  5. 2026-09-20 23:36 UTCEG score recompute
  6. 2026-09-20 23:36 UTCVendor advisory
  7. 2026-09-20 23:36 UTCGHSA enrichment
  8. 2026-09-20 20:16 UTCEPSS rescore
  9. 2026-09-20 19:29 UTCVendor advisory
  10. 2026-09-20 19:29 UTCGHSA enrichment
  11. 2026-09-20 15:22 UTCVendor advisory
  12. 2026-09-20 15:22 UTCGHSA enrichment
  13. 2026-09-20 11:13 UTCVendor advisory
  14. 2026-09-20 11:13 UTCGHSA enrichment
  15. 2026-09-20 07:06 UTCVendor advisory
  16. 2026-09-20 07:06 UTCGHSA enrichment
  17. 2026-09-20 02:25 UTCVendor advisory
  18. 2026-09-20 02:25 UTCGHSA enrichment
  19. 2026-09-19 22:19 UTCVendor advisory
  20. 2026-09-19 22:19 UTCGHSA enrichment
  21. 2026-09-19 18:11 UTCEG score recompute
  22. 2026-09-19 18:11 UTCVendor advisory
  23. 2026-09-19 18:10 UTCGHSA enrichment
  24. 2026-09-19 14:02 UTCVendor advisory
  25. 2026-09-19 14:02 UTCGHSA enrichment
Show 75 more
  1. 2026-09-19 09:53 UTCVendor advisory
  2. 2026-09-19 09:52 UTCGHSA enrichment
  3. 2026-09-19 05:22 UTCVendor advisory
  4. 2026-09-19 05:22 UTCGHSA enrichment
  5. 2026-09-19 01:14 UTCVendor advisory
  6. 2026-09-19 01:14 UTCGHSA enrichment
  7. 2026-09-18 21:07 UTCEG score recompute
  8. 2026-09-18 21:07 UTCVendor advisory
  9. 2026-09-18 21:07 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 18:20 UTCVendor advisory
  12. 2026-09-18 18:20 UTCGHSA enrichment
  13. 2026-09-18 14:13 UTCVendor advisory
  14. 2026-09-18 14:13 UTCGHSA enrichment
  15. 2026-09-18 11:29 UTCVendor advisory
  16. 2026-09-18 11:29 UTCGHSA enrichment
  17. 2026-09-18 07:22 UTCVendor advisory
  18. 2026-09-18 07:22 UTCGHSA enrichment
  19. 2026-09-18 03:15 UTCVendor advisory
  20. 2026-09-18 03:15 UTCGHSA enrichment
  21. 2026-09-17 23:08 UTCEG score recompute
  22. 2026-09-17 23:08 UTCVendor advisory
  23. 2026-09-17 23:08 UTCGHSA enrichment
  24. 2026-09-17 20:18 UTCEG score recompute
  25. 2026-09-17 20:18 UTCVendor advisory
  26. 2026-09-17 20:18 UTCGHSA enrichment
  27. 2026-09-17 19:55 UTCEG score recompute▲ 1.00
  28. 2026-09-17 19:55 UTCVendor advisory
  29. 2026-09-17 19:55 UTCGHSA enrichment
  30. 2026-09-17 19:54 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  31. 2026-09-17 10:23 UTCVendor advisory
  32. 2026-09-17 10:23 UTCGHSA enrichment
  33. 2026-09-16 22:12 UTCEG score recompute
  34. 2026-09-16 22:12 UTCVendor advisory
  35. 2026-09-16 22:12 UTCGHSA enrichment
  36. 2026-09-16 14:08 UTCEPSS rescore
  37. 2026-09-16 10:59 UTCEG score recompute
  38. 2026-09-16 10:59 UTCVendor advisory
  39. 2026-09-16 10:59 UTCGHSA enrichment
  40. 2026-09-16 05:15 UTCEPSS rescore
  41. 2026-09-15 22:48 UTCEG score recompute
  42. 2026-09-15 22:48 UTCVendor advisory
  43. 2026-09-15 22:48 UTCGHSA enrichment
  44. 2026-09-15 19:40 UTCEG score recompute
  45. 2026-09-15 19:40 UTCVendor advisory
  46. 2026-09-15 19:40 UTCGHSA enrichment
  47. 2026-09-15 18:01 UTCVendor advisory
  48. 2026-09-15 18:01 UTCGHSA enrichment
  49. 2026-09-15 11:09 UTCEG score recompute
  50. 2026-09-15 11:09 UTCVendor advisory
  51. 2026-09-15 11:09 UTCGHSA enrichment
  52. 2026-09-14 22:58 UTCVendor advisory
  53. 2026-09-14 22:58 UTCGHSA enrichment
  54. 2026-09-14 17:50 UTCVendor advisory
  55. 2026-09-14 17:50 UTCGHSA enrichment
  56. 2026-09-14 11:55 UTCVendor advisory
  57. 2026-09-14 11:55 UTCGHSA enrichment
  58. 2026-09-13 23:44 UTCEG score recompute
  59. 2026-09-13 23:44 UTCVendor advisory
  60. 2026-09-13 23:44 UTCGHSA enrichment
  61. 2026-09-13 11:34 UTCVendor advisory
  62. 2026-09-13 11:34 UTCGHSA enrichment
  63. 2026-09-12 23:23 UTCEG score recompute
  64. 2026-09-12 23:23 UTCVendor advisory
  65. 2026-09-12 23:23 UTCGHSA enrichment
  66. 2026-09-12 11:12 UTCVendor advisory
  67. 2026-09-12 11:12 UTCGHSA enrichment
  68. 2026-09-11 23:01 UTCVendor advisory
  69. 2026-09-11 23:00 UTCGHSA enrichment
  70. 2026-09-11 19:44 UTCVendor advisory
  71. 2026-09-11 19:44 UTCGHSA enrichment
  72. 2026-09-11 17:04 UTCEG score recompute
  73. 2026-09-11 17:04 UTCVendor advisory
  74. 2026-09-11 17:04 UTCGHSA enrichment
  75. 2026-09-11 14:53 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67643?
CVE-2026-67643 is a critical vulnerability published on September 8, 2026. Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.
When was CVE-2026-67643 disclosed?
CVE-2026-67643 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67643 actively exploited?
CVE-2026-67643 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 42.2% of all scored CVEs.
What is the CVSS score of CVE-2026-67643?
CVE-2026-67643 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-67643?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67643, 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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