AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-21986

CRITICAL · CVSS 9.8 EPSS 12.92% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-05-26 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. It affects VMware, VMWare, vCenter. Public exploit code or proof-of-concept references have been detected in its references. Its EPSS score suggests a 12.9% probability of exploitation in the next 30 days.

Public Exploit Signal

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

External Security References

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

CVE
CVE-2021-21986
Severity
CRITICAL
CVSS
9.8
EPSS
12.92%
VMware VMWare vCenter

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)