CVE-2021-21986
CRITICALVMware vCenter Server - Unauthenticated Access via vSphere Plugin Authentication Bypass
Title source: llmDescription
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.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_misc
https://www.vmware.com/security/advisories/VMSA-2021-0010.html
Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.html
Scores
CVSS v3
9.8
EPSS
0.0149
EPSS Percentile
81.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-306
Status
published
Products (4)
vmware/cloud_foundation
3.0 - 3.10.2.1
vmware/vcenter_server
6.5 (23 CPE variants)
vmware/vcenter_server
6.7 (17 CPE variants)
vmware/vcenter_server
7.0 (9 CPE variants)
Published
May 26, 2021
Tracked Since
Feb 18, 2026