CVE-2020-3952

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 90%CVSS: 9.8Exploit: cisa kev · ssvc active · Metasploit · epss top5pct · epss high · public exploitExposed: 0

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

Under certain conditions, vmdir that ships with VMware vCenter Server, as part of an embedded or external Platform Services Controller (PSC), does not correctly implement access controls.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
90%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

April 10, 2020

Last Modified

October 30, 2025

Advisory Details (2)

Auto-updated Sep 17, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3952
generic

Locked Out | Packet Storm

http://packetstormsecurity.com/files/157896/VMware-vCenter-Server-6.7-Authentication-Bypass.html

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 47× in last 7d / 204× 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 739 total refreshes for this CVE.

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

Publicly available exploits

(8 references)

Working exploit code is in the public domain (2 Metasploit modules) (4 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-48535
    First seen Jun 1, 2020

    VMware vCenter Server 6.7 - Authentication Bypass

    Open source ↗
  • GitHub PoCFa1c0n35/vmware_vcenter_cve_2020_3952
    First seen Apr 19, 2020

    Exploit for CVE-2020-3952 in vCenter 6.7 https://www.guardicore.com/2020/04/pwning-vmware-vcenter-cve-2020-3952/

    Open source ↗
  • GitHub PoCgelim/CVE-2020-3952
    First seen Apr 17, 2020

    VMWare vmdir missing access control exploit checker

    Open source ↗
  • GitHub PoCguardicore/vmware_vcenter_cve_2020_3952
    First seen Apr 16, 2020

    Exploit for CVE-2020-3952 in vCenter 6.7

    Open source ↗
  • GitHub PoCchronoloper/CVE-2020-3952
    First seen Apr 15, 2020

    Vuln Check

    Open source ↗
  • Metasploitauxiliary/gather/vmware_vcenter_vmdir_ldap✓ verified
    First seen Apr 9, 2020

    VMware vCenter Server vmdir Information Disclosure

    Open source ↗
  • Metasploitauxiliary/admin/ldap/vmware_vcenter_vmdir_auth_bypass✓ verified
    First seen Apr 9, 2020

    VMware vCenter Server vmdir Authentication Bypass

    Open source ↗
  • Nucleihttp/cves/2020/CVE-2020-3952.yaml
    First seen Jan 1, 2020

    VMware vCenter Server LDAP Broken Access Control

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2020-3952?
CVE-2020-3952 is a critical vulnerability published on April 10, 2020. Under certain conditions, vmdir that ships with VMware vCenter Server, as part of an embedded or external Platform Services Controller (PSC), does not correctly implement access controls.
When was CVE-2020-3952 disclosed?
CVE-2020-3952 was first published in the National Vulnerability Database on April 10, 2020, with the most recent update on October 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-3952 actively exploited?
Yes. CISA added CVE-2020-3952 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting VMware vCenter Server. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-3952?
CVE-2020-3952 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2020-3952?
CVE-2020-3952 affects VMware vCenter Server. 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-2020-3952?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-3952, 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-2020-3952

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