CVE-2026-59346 VMware Workstation and Fusion VMXNET3 integer-overflow vulnerability
A local attacker with admin privileges in a VM can exploit an integer overflow in the VMXNET3 adapter to execute code on the host system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-59346?
CVE-2026-59346 is a critical vulnerability in VMware Fusion, published on 7 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
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)
Weakness: CWE-190
Which versions are affected by CVE-2026-59346?
How do I fix CVE-2026-59346?
No fix has been published for CVE-2026-59346 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-59346 being exploited?
There is no known exploitation of CVE-2026-59346 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-88p7-h25r-m6vw.