Security readout for executives and security teams
CVE-2020-3952 is a critical access-control failure in VMware vCenter Server's vmdir component. An unauthenticated network attacker could potentially access or change sensitive directory data. The highest concern is vCenter 6.7 systems upgraded from older 6.0 or 6.5 lines, not clean 6.7 installs. Exposure is likely limited to VMware vCenter Server 6.7 environments using embedded or external PSC that were upgraded from 6.0 or 6.5 and remain before 6.7u3f. Treat this as urgent for any legacy VMware estate. It affects central virtualization management, has critical impact, requires no authentication, and is listed by CISA as known exploited. Mitigation focus: Upgrade affected vCenter Server 6.7 deployments to 6.7u3f or later per VMware guidance.; Prioritize internet-reachable or broadly reachable vCenter and PSC systems first.; Restrict administrative network access to vCenter, PSC, and vmdir services where possible..
Michael Williams reviewed this cited source version on .
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CWE-306: Credential and account abuse lookup
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Open ATT&CK lookupCVE-2020-3952 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.vmware.com/security/advisories/VMSA-2020-0006CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3952CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.