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CVE-2026-59346

Critical

Description

VMware Workstation and Fusion contain an integer-overflow vulnerability. 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. Affected versions: - VMware Workstation: 25H2, 26H1 (fixed in 26H1u1) - VMware Fusion: 25H2, 26H1 (fixed in 26H1u1)

SeverityCritical
CVSS9.3
Exploit probability—
ProductVMware Workstation
PublishedOct 7, 2026
First seenOct 7, 2026
Weakness typeCWE-190Integer overflow

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

ProductAffected versionsFixed in
VMware VMware Workstation25H2 ≤ v ≤ 26H1—
VMware VMware Fusion25H2 ≤ v ≤ 26H1—

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