Integer Overflow Vulnerability in VMware Workstation and Fusion Products

CVE-2026-59346

What is CVE-2026-59346?

CVE-2026-59346 is a significant integer overflow vulnerability affecting VMware Workstation and Fusion products. These virtualization platforms are widely used for creating and managing virtual machines, making them essential for development, testing, and production environments. The vulnerability specifically targets systems with the VMXNET3 virtual network adapter, allowing a malicious actor with local administrative privileges on a compromised virtual machine to exploit this flaw. Such an exploitation could lead to arbitrary code execution on the host system, which poses a critical risk to the security and integrity of the entire virtualized environment and the data contained within it. This vulnerability highlights the potential for severe consequences if organizations fail to implement timely patches and mitigations.

Potential impact of CVE-2026-59346

1. Arbitrary Code Execution: Successful exploitation of this vulnerability could allow attackers to run arbitrary code on the host machine. This capability can lead to unauthorized access to sensitive data, system takeover, and deployment of malware, all of which can severely compromise an organization's security posture.

2. Risk of Data Breach: Given the critical access provided by local administrative privileges, attackers could gain control over sensitive information and assets. This exposure could result in substantial data breaches, regulatory penalties, and loss of customer trust.

3. Operational Disruption: The potential for code execution at the host level may lead to system instability, performance issues, and in severe cases, complete shutdowns or crashes of virtualized environments. This disruption can affect business continuity and lead to significant financial losses from downtime and recovery efforts.

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News Articles

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CVE-2026-59346

PoC Exploit Released for Critical VMware Vulnerability Enabling Guest-to-Host Attacks - IT Security News

2026-10-08 13:10 A public proof-of-concept (PoC) exploit has been released for CVE-2026-59346, a critical integer overflow flaw in VMware Workstation and Fusion that could enable a privileged...

1 month ago

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