CVE-2021-21991

HIGH

VMware Cloud Foundation 3.0-3.10.2.1 and vCenter Server - Local Privilege Escalation via Session Token Handling

Title source: llm
STIX 2.1

Description

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