Description
SFCB (Small Footprint CIM Broker) as used in ESXi has an authentication bypass vulnerability. A malicious actor with network access to port 5989 on ESXi may exploit this issue to bypass SFCB authentication by sending a specially crafted request.
Analysis
No analysis available yet.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | VMware ESXi and VMware Cloud Foundation | affected |
|
Configuration 1 [-]
|
Configuration 2 [-]
|
No data.
No data available yet.
Remediation
No remediation available yet.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
 EUVD |
EUVD-2021-9165 | SFCB (Small Footprint CIM Broker) as used in ESXi has an authentication bypass vulnerability. A malicious actor with network access to port 5989 on ESXi may exploit this issue to bypass SFCB authentication by sending a specially crafted request. |
References
History
Fri, 31 Oct 2025 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:* |
MITRE
Status: PUBLISHED
Assigner: vmware
Published:
Updated: 2024-08-03T18:30:23.556Z
Reserved: 2021-01-04T00:00:00.000Z
Link: CVE-2021-21994
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-07-13T19:15:09.327
Modified: 2025-10-31T11:44:38.620
Link: CVE-2021-21994
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses