CVE-2021-21991

HIGHScheduled

Published:Sep 22, 2021(4 years ago)

Modified:Nov 21, 2024

Local AccessNo InteractionLow Complexity

Vulnerability 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).

Attack Characteristics

Local AccessLow ComplexityLow PrivilegesNo User Interaction

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AI analysis not yet available

Plain-English explanation, risk summary, and remediation steps will appear here once AI analysis is complete.

No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
vmware	cloud_foundation	3.0 - 3.10.2.2	-
vmware	cloud_foundation	4.0 - 4.3	-
vmware	vcenter_server

Timeline

Published
CVE disclosed publicly
Sep 22, 20214 years ago
Last Modified
Most recent update
Nov 21, 20241 year ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20262 months ago

References

https://www.vmware.com/security/advisories/VMSA-2021-0020.htmlPatch
https://www.vmware.com/security/advisories/VMSA-2021-0020.htmlPatch

CVSS Score

v3.1

7.8/ 10.0

HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

At a Glance

Affected Products

References

vmware / cloud_foundation

CVE-2021-21991

Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

CVE-2021-21991

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description