VMware Patches Authentication Bypass Flaw in Windows Tool

On Tuesday, VMware issued an urgent fix for a security flaw in its VMware Tools for Windows. CVE-2025-22230 allows a malicious user with basic access on a Windows guest virtual machine to execute high-privilege tasks within that VM.

VMware’s important bulletin states that an authentication bypass bug, due to improper access control, has a CVSS severity score of 7.8/10.

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The company acknowledged a researcher from Positive Technologies, a Russian cybersecurity firm, for discovering the bug and stated that patches have been added to VMware Tools for Windows v 12.5.1.

The Linux and macOS versions of the utilities are not affected.

VMware Tools for Windows is a set of utilities and drivers that improves virtual machine performance and management, offering enhanced graphics, better mouse integration, and time synchronization between the host and guest operating systems.

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