Vulnerability Details : 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 request.
Vulnerability category: BypassGain privilege
Published 2021-07-13 19:15:09
Updated 2022-06-02 19:18:42
Source VMware
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-21994

Probability of exploitation activity in the next 30 days: 0.22%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 60 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-21994

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Source
6.8
 MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:P
8.6
6.4
 nvd@nist.gov
9.8
 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
 nvd@nist.gov

CWE ids for CVE-2021-21994

  • When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-21994

Products affected by CVE-2021-21994

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