CVE-2026-83711

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-04. the CNA's CVSS baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 10.0Exploit: None knownExposed: 0

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

Authorization bypass through user-controlled key in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.

CVSS v3
10.0
EG Score
10.0(high)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

September 3, 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-2026-83711

Vendor Advisories for CVE-2026-83711(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 97× in last 7d / 223× 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 223 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-83711?
CVE-2026-83711 is a critical vulnerability published on September 3, 2026. Authorization bypass through user-controlled key in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.
When was CVE-2026-83711 disclosed?
CVE-2026-83711 was first published in the National Vulnerability Database on September 3, 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-2026-83711 actively exploited?
CVE-2026-83711 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 53.5% of all scored CVEs.
What is the CVSS score of CVE-2026-83711?
CVE-2026-83711 has a CVSS v4.0 base score of 10.0 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-83711?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-83711, 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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