Answer in brief
CVE-2021-21972 records a High severity vulnerability in CVE Program Container. The current sources mark it as known exploited. The current feed maps n/a/VMware Cloud Foundation (generic), n/a/VMware vCenter Server (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps n/a/VMware Cloud Foundation (generic), n/a/VMware vCenter Server (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| n/a/VMware Cloud Foundationgeneric | 4.x before 4.2 || 3.x before 3.10.1.2 | Not reported |
| n/a/VMware vCenter Servergeneric | 7.x before 7.0 U1c || 6.7 before 6.7 U3l || 6.5 before 6.5 U3n | Not reported |
Published upstream
Feb 24, 2021
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Nov 3, 2021
Evidence: source:kev:kev:kev:recordThe vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server. This affects VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2021-21972 records a High severity vulnerability in CVE Program Container. The current sources mark it as known exploited. The current feed maps n/a/VMware Cloud Foundation (generic), n/a/VMware vCenter Server (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps n/a/VMware Cloud Foundation (generic), n/a/VMware vCenter Server (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| n/a/VMware Cloud Foundationgeneric | 4.x before 4.2 || 3.x before 3.10.1.2 | Not reported |
| n/a/VMware vCenter Servergeneric | 7.x before 7.0 U1c || 6.7 before 6.7 U3l || 6.5 before 6.5 U3n | Not reported |
Published upstream
Feb 24, 2021
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Nov 3, 2021
Evidence: source:kev:kev:kev:recordThe vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server. This affects VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).
Quoted source text, attributed separately from HOL analysis.