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CRITICAL · 9.8

CVE-2021-21994

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 authentic...

Vulnerability 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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
VmwareCloud Foundation>= 3.0, < 3.10.2
VmwareEsxi6.5

Related Weaknesses (CWE)

CWE-287

References

FAQ

What is CVE-2021-21994?

CVE-2021-21994 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 authentic...

How severe is CVE-2021-21994?

CVE-2021-21994 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-21994?

Check the references section above for vendor advisories and patch information. Affected products include: Vmware Cloud Foundation, Vmware Esxi.