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CVE-2025-41236

CriticalPublished

VMXNET3 integer-overflow vulnerability

Published: Jul 15, 2025
Updated: Feb 26, 2026
Assigning CNA: vmware
Evidence observed: Sep 16, 2026

Primary CVSS

9.3/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS probability estimate

2.5%

Low · next 30 days

Percentile: 84.1%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

VMware ESXi, Workstation, and Fusion contain an integer-overflow 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.

Sources

CVE-2026-59346-POCPoC
PoC for CVE-2026-59346 - 32-bit integer overflow in VMware's VMXNET3 TSO segmentation path, guest-to-host crash.

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