CVE-2021-21991

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).

7.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.10%

Vendor Advisory vmware.com

Affected: n/a VMware vCenter Server, VMware Cloud Foundation

References

Link	Tags
https://www.vmware.com/security/advisories/VMSA-2021-0020.html	patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-21991?: CVE-2021-21991 has been scored as a high severity vulnerability.
How to fix CVE-2021-21991?: To fix CVE-2021-21991, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21991 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-21991 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21991?: CVE-2021-21991 affects n/a VMware vCenter Server, VMware Cloud Foundation.

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