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CVE-2021-21985VMware vCenter Server Improper Input Validation Vulnerability

The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server.

9.8 CRITICALEPSS 99.99%⚡ Known Exploited (CISA KEV)NVD: Analyzed

OverviewAffected ProductsReferences
NVD CVE.org

Overview

Severity

ScoreSeverityVersionVector String
9.8CRITICAL3.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0HIGH2.0NVDAV:N/AC:L/Au:N/C:C/I:C/A:C

CISA required action

⚡ Known exploited · remediation due Nov 17, 2021

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Details

CVE ID
CVE-2021-21985
Status
Analyzed
Assigner (CNA)
vmware
Published
May 26, 2021
Last modified
2026-08-12 05:17 UTC
Weaknesses

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 09:48 UTC.