### [CVE-2021-21986](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21986)
![](https://img.shields.io/static/v1?label=Product&message=VMware%20vCenter%20Server%20and%20VMware%20Cloud%20Foundation&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Issue%20with%20Authentication%20mechanism&color=brighgreen)

### Description

The vSphere Client (HTML5) contains a vulnerability in a vSphere authentication mechanism for the Virtual SAN Health Check, Site Recovery, vSphere Lifecycle Manager, and VMware Cloud Director Availability plug-ins. A malicious actor with network access to port 443 on vCenter Server may perform actions allowed by the impacted plug-ins without authentication.

### POC

#### Reference
- http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.html

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/DaveCrown/vmware-kb82374