CVE-2026-59309

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-30. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 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: 8%CVSS: 9.8Exploit: None knownExposed: 0

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

VMware vCenter contains an authentication bypass vulnerability in the VMware Directory Service. A malicious actor with network access to vCenter may exploit this issue to bypass authentication and gain unauthorized access to the system.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
62(Track)
EG Risk 62/100SSVC: 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%
Exploitation8% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
8%
EPSS %ILE
94%
KEV
Not listed

Published

July 30, 2026

Last Modified

August 25, 2026

Advisory Details (1)

Auto-updated Sep 9, 2026
No patch confirmed yet.
generic

Support Content Notification - Support Portal - Broadcom support portal

https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/38017

Vendor Advisories for CVE-2026-59309(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 37× in last 7d / 162× 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 296 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-59309?
CVE-2026-59309 is a critical vulnerability published on July 30, 2026. VMware vCenter contains an authentication bypass vulnerability in the VMware Directory Service. A malicious actor with network access to vCenter may exploit this issue to bypass authentication and gain unauthorized access to the system.
When was CVE-2026-59309 disclosed?
CVE-2026-59309 was first published in the National Vulnerability Database on July 30, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59309 actively exploited?
CVE-2026-59309 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8% probability of exploitation in the next 30 days, which ranks it in the top 5.6% of all scored CVEs.
What is the CVSS score of CVE-2026-59309?
CVE-2026-59309 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-59309?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59309, 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

Explore the affected products and dependency analysis for CVE-2026-59309

Explore →

Is Your Infrastructure Affected by CVE-2026-59309?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs