VMware ESXi Arbitrary Write Vulnerability

Critical Threat Advisory: This vulnerability is documented in active Ransomware campaigns. Immediate remediation required.

Technical Severity

CVSS v3.1 Metrics

HIGH

8.2 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Exploitation Likelihood

EPSS Prediction

6.15 %

Predictive Probability

Percentile Rank

90.6 th

Documented as more likely to be exploited than 90.6% of known CVEs.

Detection Date

Mar 04, 2025

Remediation Due

Mar 25, 2025

CISA Catalog Active

Threat Analysis

VMware ESXi contains an arbitrary write vulnerability. Successful exploitation allows an attacker with privileges within the VMX process to trigger an arbitrary kernel write leading to an escape of the sandbox.

Remediation Directive

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Asset Context

Vendor Identity

VMware

Affected Product

ESXi

Ransomware Status

Campaign Use Known

Weakness Classification

CWE-123

External Intelligence

https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/25390

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2025-22225