Vulnerability · Published Oct 7, 2026 · Assigned by vmware
CVE-2026-59346VMware Workstation and Fusion VMXNET3 integer-overflow vulnerability
Critical 9.3
In plain English
A critical-severity integer overflow in VMware Fusion from VMware. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official 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)
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| VMware | VMware Workstation | 25H2 – through 26H1 |
| VMware | VMware Fusion | 25H2 – through 26H1 |
Weakness: CWE-190 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H