Quick answers
- Is CVE-2026-59346 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-59346 being exploited in the wild.
- How severe is CVE-2026-59346?
- Critical severity, with a CVSS score of 9.3, published 7 October 2026.
- Which products and versions are affected?
- VMware Fusion 25H2, 26H1; VMware Workstation 25H2, 26H1.
- Is there a fix for CVE-2026-59346?
- Yes: fixed in VMware Workstation 26H1u1; VMware Fusion 26H1u1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-59346 attacked?
- It is attacked with local access, in a web application.
- Am I affected by CVE-2026-59346?
- Check whether you run VMware Fusion or VMware Workstation at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: VMware Workstation 26H1u1; VMware Fusion 26H1u1
Technical details
An integer-overflow vulnerability in the VMXNET3 virtual network adapter component of VMware Workstation and Fusion allows guest-to-host code execution. The attack requires local administrative privileges on the virtual machine and network access to the VMXNET3 adapter. A successful exploit grants the attacker arbitrary code execution on the host system, breaking the isolation boundary between guest and host.
Affected products
- VMware Workstation 25H2, 26H1
- VMware Fusion 25H2, 26H1
Timeline
- 2026-09-03: advisory: VMSA-2026-0007 published
- 2026-10-07: disclosed: Publicly disclosed