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Case File

CVE-2021-21994

CRITICAL · CVSS 9.8 EPSS 1.16% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-07-13 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-21994
Severity
CRITICAL
CVSS
9.8
EPSS
1.16%
ESXi

Original NVD 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.