---
title: "CVE-2026-59346: VMware Workstation & Fusion - Integer Overflow"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-59346/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-59346)

## 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](https://cwe.mitre.org/data/definitions/190.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-59346](https://nvd.nist.gov/vuln/detail/CVE-2026-59346)
- [https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/security-advisories/0/38288](https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/security-advisories/0/38288)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)