Actively exploited in the wild
VMware ESXi Arbitrary Write Vulnerability
VMware - ESXi · Listed in the CISA KEV since 2025-03-04. This indicates confirmed attacks in production environments.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVE-2025-22225
HighCVSS 8.2KEVExploitation Probability (EPSS)
Elevated risk59th percentile - higher than 59% of all known CVEs
Summary
VMware ESXi contains an arbitrary write vulnerability. A malicious actor with privileges within the VMX process may trigger an arbitrary kernel write leading to an escape of the sandbox.
Risk Assessment
The risk for the organization includes potential takeover of the ESXi host, which could compromise the integrity and confidentiality of all virtual machines.
Recommendation
It is recommended to apply patches provided by VMware immediately and restrict access to the VMX process to trusted administrators only.
Original NVD description (English source)
VMware ESXi contains an arbitrary write vulnerability. A malicious actor with privileges within the VMX process may trigger an arbitrary kernel write leading to an escape of the sandbox.