The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server.
Is CVE-2021-21985 exploited?
Listed in the CISA KEV catalog on 2021-11-03.
Federal remediation due 2021-11-17.
Past that date by 1808 days.
Used in ransomware campaigns.
EPSS puts exploitation in the next 30 days at 100.0%.
Public exploit code: packaged in a public tool.
Public detection rules exist.
Which products and versions are affected?
VMware vCenter Server and VMware Cloud Foundation · VMware vCenter Server (7.x before 7.0 U2b, 6.7 before 6.7 U3n, 6.5 before 6.5 U3p) and VMware Cloud Foundation (4.x before 4.2.1, 3.x before 3.10.2.1)
Is there a patch?
Patch information is not available in this record.