CVE-2026-59115

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-07. the CNA's CVSS baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.9Exploit: None knownExposed: 0

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

'.../...//' in Microsoft Entra Provisioning Service (SyncFabric) allows an authorized attacker to elevate privileges over a network.

CVSS v3
9.9
EG Score
9.9(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity99% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
54%
KEV
Not listed

Published

August 6, 2026

Last Modified

September 16, 2026

Advisory Details (1)

Auto-updated Sep 16, 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-2026-59115

Vendor Advisories for CVE-2026-59115(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 79× in last 7d / 338× 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 557 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-59115?
CVE-2026-59115 is a critical vulnerability published on August 6, 2026. '.../...//' in Microsoft Entra Provisioning Service (SyncFabric) allows an authorized attacker to elevate privileges over a network.
When was CVE-2026-59115 disclosed?
CVE-2026-59115 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59115 actively exploited?
CVE-2026-59115 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 46.0% of all scored CVEs.
What is the CVSS score of CVE-2026-59115?
CVE-2026-59115 has a CVSS v4.0 base score of 9.9 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-59115?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59115, 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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