CVE-2021-21991
HIGHVMware Cloud Foundation 3.0-3.10.2.1 and vCenter Server - Local Privilege Escalation via Session Token Handling
Title source: llmDescription
The vCenter Server contains a local privilege escalation vulnerability due to the way it handles session tokens. A malicious actor with non-administrative user access on vCenter Server host may exploit this issue to escalate privileges to Administrator on the vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash).
References (1)
Core 1
Core References
Patch, Vendor Advisory x_refsource_misc
https://www.vmware.com/security/advisories/VMSA-2021-0020.html
Scores
CVSS v3
7.8
EPSS
0.0019
EPSS Percentile
41.1%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
Status
published
Products (4)
vmware/cloud_foundation
3.0 - 3.10.2.2
vmware/vcenter_server
6.5 (24 CPE variants)
vmware/vcenter_server
6.7 (19 CPE variants)
vmware/vcenter_server
7.0 (6 CPE variants)
Published
Sep 22, 2021
Tracked Since
Feb 18, 2026