CVE-2021-21985

CRITICALImmediate

Published:May 26, 2021(5 years ago)

Modified:Oct 30, 2025

Remote ExploitNo Auth RequiredNo InteractionLow Complexity

Vulnerability 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.

Attack Characteristics

Network AccessLow ComplexityNo Auth NeededNo User Interaction

🤖

AI analysis not yet available

Plain-English explanation, risk summary, and remediation steps will appear here once AI analysis is complete.

No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
vmware	vcenter_server	-	-
vmware	vcenter_server	-	-
vmware	vcenter_server	-

Timeline

Published
CVE disclosed publicly
May 26, 20215 years ago
Last Modified
Most recent update
Oct 30, 20257 months ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20262 months ago

References

http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2...Third Party Advisory
http://packetstormsecurity.com/files/163487/VMware-vCenter-Server-Virt...Exploit
https://www.vmware.com/security/advisories/VMSA-2021-0010.htmlVendor Advisory

CVSS Score

v3.1

9.8/ 10.0

CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

At a Glance

Affected Products

References

vmware / vcenter_server

CVE-2021-21985

Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

CVE-2021-21985

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description