CVE-2026-47876: VMware Cloud Foundation

Critical severity, CVSS 9.3. EPSS: 0.2% chance of exploitation in the next 30 days.

VMware ESX contains an out-of-bounds write vulnerability in the VMXNET3 virtual network adapter. A malicious actor with local administrative privileges on a virtual machine with VMXNET3 virtual network adapter may exploit this issue to execute code on the host. Non VMXNET3 virtual adapters are not affected by this issue.

Affected products

• VMware Cloud Foundation: version 9.1.x.x only; version 9.0.x.x only; from 5, before 6 (fixed in 6)
• VMware Esx
• VMware Telco Cloud Platform: from 5.1, before 5.2 (fixed in 5.2); from 5.0, before 5.1 (fixed in 5.1)
• VMware Vsphere Foundation: version 9.1.x.x only; version 9.0.x.x only

Published 2026-07-30. Last modified 2026-07-30.