CVE-2026-47876

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.

Score

CVSS 3.1 9.3 Critical

Status

Awaiting Analysis - security@vmware.com

Published

2026-07-30

Last modified

2026-07-30

Weaknesses

CWE-787

Affected products

• Cloud Foundation (Vmware)
• Esx (Vmware)
• Telco Cloud Platform (Vmware)
• Vsphere Foundation (Vmware)

References

• https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/38017