VulnerabilityModified
CVE-2021-21991
The vCenter Server contains a local privilege escalation vulnerability due to the way it handles session tokens.
HIGH 7.8EPSS 0.32%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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).
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.32% probability · 24th percentile
- CISA KEV
- Not listed
- Affected
- vmware/cloud foundation · vmware/vcenter server
- Source
- security@vmware.com
References
- https://www.vmware.com/security/advisories/VMSA-2021-0020.htmlPatch, Vendor Advisory
- https://www.vmware.com/security/advisories/VMSA-2021-0020.htmlPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.