Security readout for executives and security teams
Plain-English summary
CVE-2020-4005 is a VMware ESXi privilege-escalation issue. An attacker already operating within the VMX process could gain higher privileges on the ESXi host, but the source states exploitation requires chaining with another vulnerability such as CVE-2020-4004.
Executive priority
Treat as a maintenance-priority hypervisor issue unless affected hosts run untrusted workloads or remain exposed to related chainable vulnerabilities. Business risk rises because successful escalation could affect the virtualization layer.
Technical view
The vulnerability affects VMware ESXi 7.0, 6.7, and 6.5 before the listed fixed builds. It relates to how certain system calls are managed. Preconditions are significant: the actor needs VMX-process privileges and a second vulnerability to complete exploitation.
Likely exposure
Exposure is limited to affected VMware ESXi hosts running versions before ESXi70U1b-17168206, ESXi670-202011101-SG, or ESXi650-202011301-SG. Organizations with older ESXi estates or untrusted VM workloads should treat this as relevant.
Exploitation context
The source bundle does not show CISA KEV listing, public exploitation, exploit code, or standalone exploitability. It explicitly says successful exploitation is only possible when chained with another vulnerability, for example CVE-2020-4004.
Researcher notes
Key uncertainty is missing CVSS/severity data in the provided bundle. Analysis should focus on affected ESXi build verification, VMX-process privilege precondition, and whether CVE-2020-4004 or similar chain prerequisites exist in the environment.
Mitigation direction
- Upgrade affected ESXi hosts to the fixed builds or later.
- Review VMware VMSA-2020-0026 for supported remediation guidance.
- Remediate chainable issues such as CVE-2020-4004 where applicable.
- Prioritize hosts running untrusted or high-risk workloads.
Validation and detection
- Inventory ESXi 7.0, 6.7, and 6.5 host build numbers.
- Confirm hosts meet or exceed the fixed build listed for their branch.
- Check vulnerability management results for CVE-2020-4004 and related ESXi findings.
- Confirm remediation evidence against VMware VMSA-2020-0026.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2020-4005 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.vmware.com/security/advisories/VMSA-2020-0026.htmlCVE reference · x_refsource_CONFIRM
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.