Chinese Hackers Exploit VMware Zero-Day to Backdoor Windows and Linux Systems Daniel Bender Jun 14, 2023 The Chinese state-sponsored group known as UNC3886 has been found to exploit a zero-day flaw in VMware ESXi hosts to backdoor Windows and Linux systems. The VMware Tools authentication bypass vulnerability, tracked as CVE-2023-20867 (CVSS score: 3.9), "enabled the execution of privileged commands across Windows, Linux, and PhotonOS (vCenter) guest VMs without authentication of guest credentials