CVE-2025-22247: VMware Tools Vulnerability Enables Risky File Manipulation on Guest Systems
A newly uncovered flaw in VMware Tools introduces a potential threat to virtual machine environments, allowing attackers with basic user rights to tamper with internal files and provoke unsafe behaviors within guest systems.
Identified as CVE-2025-22247, the issue impacts VMware Tools versions 11.x.x and 12.x.x on Windows and Linux platforms. macOS installations are not affected. No official workaround is currently available, making timely patch deployment critical to safeguarding VM integrity.
According to Broadcom’s advisory, the vulnerability stems from improper file handling, enabling a low-privileged attacker to corrupt local VM files and initiate unauthorized operations. While it doesn’t affect the hypervisor or host machine, the potential for use in privilege escalation or multi-stage attacks cannot be dismissed.
The flaw carries a CVSS v3 score of 6.1, categorizing it as moderate in severity. Security researcher Sergey Bliznyuk from Positive Technologies is credited with responsibly disclosing the issue.
This comes on the heels of VMware’s recent patch for CVE-2025-22224, a critical time-of-check-to-time-of-use (TOCTOU) vulnerability affecting ESXi and Workstation, which could lead to memory corruption and remote code execution.
In tightly packed virtual infrastructures, where multiple workloads co-exist on shared hardware, any file-level weakness — even within a single guest VM — can become a pivot point for broader compromise.
Organizations running affected VMware Tools versions are strongly urged to update immediately to reduce exposure and prevent potential exploitation in production environments.
Risk Overview
| Category | Information |
|---|---|
| Vulnerable Versions | VMware Tools versions 11.x.x and 12.x.x for Windows and Linux |
| Threat Impact | Unauthorized file modification that may lead to malicious activity inside VMs |
| Attack Requirements | Attacker must have limited (non-admin) access to the targeted guest machine |
| Severity Rating | CVSS v3.1: 6.1 – Classified as Moderate |
Update & Response Strategy
Broadcom has rolled out VMware Tools 12.5.2, delivering targeted fixes for the recently identified vulnerability on both Windows and Linux platforms. Notably, Windows 32-bit systems receive their patch through VMware Tools 12.4.7, bundled within the same release.
For Linux users, the fix will be provided through vendor-maintained packages of open-vm-tools, with release timelines and version numbers varying based on individual Linux distributions. Users should monitor updates from their distribution maintainers to ensure timely adoption.
This flaw affects a core component in enterprise virtualization stacks—VMware Tools, which functions as the performance and integration layer between the guest OS and its virtual environment. It supports features like time sync, clipboard bridging, enhanced graphics, and file exchanges between guest and host systems.
The current update arrives just two months after VMware Tools 12.5.1 addressed another security concern (CVE-2024-43590), underscoring a pattern of recurring security challenges in virtualization toolsets.
In virtualized ecosystems—particularly multi-tenant environments—unpatched software can become a vector for escalation and lateral movement. With no alternative mitigations available for CVE-2025-22247, the only viable defense is prompt patch deployment.
Administrators should treat this update as a priority to safeguard against potential exploitation within VM boundaries.
