VULNERABILITY INTELLIGENCE

CVE-2021-21991

CVSS score7.8 HIGH
EPSS probability0.32%
CISA KEVNot currently listed
Published2021-09-22
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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).

Weakness classification

  • nvd@nist.gov: NVD-CWE-noinfo

Primary references