Quick answers
- Is CVE-2026-59347 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-59347 being exploited in the wild.
- How severe is CVE-2026-59347?
- High severity, with a CVSS score of 8.1, published 7 October 2026.
- Which products and versions are affected?
- VMware Fusion 25H2, 26H1; VMware Workstation 25H2, 26H1.
- Is there a fix for CVE-2026-59347?
- 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-2026-59347 attacked?
- It is attacked with local access, in a network appliance.
- Am I affected by CVE-2026-59347?
- 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
A stack-based buffer overflow exists in the HGFS (Host Guest File System) component of VMware Workstation and Fusion. An attacker with local administrative privileges inside a virtual machine can trigger this overflow to execute arbitrary code with VMX process privileges on the host system. The vulnerability requires local administrative access and specific conditions to trigger, but provides a path from guest VM compromise to host compromise.
Affected products
- VMware Workstation 25H2, 26H1
- VMware Fusion 25H2, 26H1
Timeline
- 2026-09-03: disclosed
- 2026-09-03: patched