CVE-2026-21957
7.5Oracle · VM VirtualBox
A high-privileged local vulnerability exists in the Oracle VM VirtualBox Core component, which may allow an authenticated attacker to achieve a full system takeover.
Executive summary
A critical security vulnerability in Oracle VM VirtualBox allows a high-privileged attacker to compromise the application and potentially impact the underlying infrastructure.
Vulnerability
This vulnerability resides in the Core component of Oracle VM VirtualBox and requires an attacker to possess high privileges and local access to the target infrastructure. The flaw is characterized by a complex attack vector (AV:L/AC:H/PR:H) that can lead to a full takeover of the virtualized environment.
Business impact
The exploitation of this vulnerability poses a significant risk to organizational data and infrastructure integrity. With a CVSS score of 7.5, the vulnerability is classified as High severity, as successful exploitation can lead to a complete compromise of the virtualized environment and potentially affect other systems due to the scope change (S:C). This could result in unauthorized data access, loss of operational control, and significant downtime for dependent services.
Remediation
Immediate Action: Review the official Oracle Critical Patch Update for January 2026 and apply all relevant security patches provided by the vendor for versions 7.1.14 and 7.2.4.
Proactive Monitoring: Audit local system logs for unusual administrative activity or unauthorized attempts to access the VirtualBox Core processes by users with high-level permissions.
Compensating Controls: Restrict access to the host infrastructure to only essential personnel and enforce the principle of least privilege to minimize the number of accounts that could potentially trigger this vulnerability.
Exploitation status
Public Exploit Available: exploit_available (false)
Analyst recommendation
Given the potential for full system compromise, security teams should prioritize the identification of all instances of Oracle VM VirtualBox within their environment. Although the requirement for high-level local privileges limits the immediate attack surface, organizations must apply the forthcoming vendor patches as soon as they become available to eliminate the risk of privilege escalation and infrastructure takeover.
More Oracle CVEs
Sources
- Oracle Advisory Vendor advisory