VULNERABILITY INTELLIGENCE

CVE-2021-21994

CVSS score9.8 CRITICAL
EPSS probability1.17%
CISA KEVNot currently listed
Published2021-07-13
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • nvd@nist.gov: CWE-287

Primary references