CVE-2026-59346 VMware Workstation & Fusion - Integer Overflow

VMware Workstation and Fusion 25H2 and 26H1 contain an integer overflow caused by improper handling in VMXNET3 virtual network adapter, letting local attackers with admin privileges on a VM execute code on the host, exploit requires local admin on VM.

CVSS base score 9.3 /10
Critical
CISA KEV
Not listed
Public exploit
Proof of concept available
Authentication
Not required
EPSS
0.26% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Integer Overflow
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
7 October 2026
Updated
15 October 2026
Weakness
CWE-190

Vendor fix

Update to version 26H1u1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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