What is CVE-2021-21994?

CVE-2021-21994 is a critical-severity vulnerability in Vmware Cloud_foundation, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-07-13.

How severe is CVE-2021-21994?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Vmware Cloud_foundation

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 authentication by sending a specially crafted re…

Vulnerability class: Broken Authentication

EPSS: 0.012 (63.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Vmware Cloud_foundation
Vmware Esxi — versions 6.5, 6.7, 7.0
N/a Vmware Esxi And Cloud Foundation — versions VMware ESXi(7.0 before ESXi70U2-17630552, 6.7 before ESXi670-202103101-SG, 6.5 before ESXi650-202107401-SG) and VMware Cloud Foundation (4.x, 3.x before 3.10.2)

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

security@vmware.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-21994?: CVE-2021-21994 is a critical-severity vulnerability in Vmware Cloud_foundation, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-07-13.
How severe is CVE-2021-21994?: Critical severity. CVSS v3 base score is 9.8 out of 10.