They've just updated their vCenter documentation with information on the vulnerability. I guess they didn't want to release that information when the patch was released.
VMware reveals critical vCenter vuln that you may have patched already without knowing it
VMware has disclosed a critical vulnerability in its vCenter Server – and that it issued an update to fix it weeks ago, along with patches for unsupported versions of the software. The soon-to-be-acquired-by-Broadcom virtualization giant on Wednesday delivered news that its implementation of the Distributed Computing …