VULNERABILITY INTELLIGENCE
CVE-2021-21985
CVSS score9.8 CRITICAL
EPSS probability100.00%
CISA KEVKnown exploited vulnerability
Published2021-05-26
Last modified2026-08-12
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Known Exploited Vulnerability
VMware vCenter Server Improper Input Validation Vulnerability
Vendor / product: VMware / vCenter Server
Description
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.
Weakness classification
- nvd@nist.gov: CWE-918
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-20
Primary references
- security@vmware.com — Third Party Advisory, VDB Entry
- security@vmware.com — Exploit, Third Party Advisory, VDB Entry
- security@vmware.com — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 — US Government Resource