CVE-2026-87268 in VirtualBox
Summary
by MITRE
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is 7.2.16. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. Successful attacks of this vulnerability can result in takeover of Oracle VM VirtualBox. Note: This vulnerability applies to Windows host only. CVSS 3.1 Base Score 7.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the core component of Oracle VM VirtualBox version 7.2.16, representing a critical security flaw that affects only Windows host environments. This issue is classified as an easily exploitable vulnerability that permits low-privileged attackers to compromise the virtualization infrastructure upon gaining logon access to the underlying system. The severity of this defect is underscored by its high impact on confidentiality, integrity, and availability, resulting in a CVSS 3.1 Base Score of 7.8. This score indicates that successful exploitation can lead to complete takeover of Oracle VM VirtualBox, allowing an attacker to execute arbitrary code with the privileges of the virtualization process or potentially escape the guest environment to compromise the host system depending on specific implementation details not fully detailed in the summary but implied by the high availability and integrity impacts.
From a technical perspective, vulnerabilities in hypervisor cores often stem from improper handling of memory structures, race conditions in resource allocation, or insufficient validation of inputs during virtual hardware emulation processes. In this context, an attacker with low privileges on the Windows host can leverage specific interactions within VirtualBox to escalate their access level beyond what is intended by the operating system's security model. The requirement for local logon means that physical access or initial foothold via phishing or other lateral movement techniques is necessary before exploitation can occur. However, once such access is obtained, the ease of exploitation suggests a lack of robust boundary checks between user-space applications and kernel-mode hypervisor components, which are typically protected by stricter security controls in modern operating systems.
The operational impact of this vulnerability is severe due to its potential for privilege escalation and system compromise. An attacker who successfully exploits this flaw can achieve full control over Oracle VM VirtualBox, which may translate into the ability to read sensitive data from guest virtual machines, modify or destroy stored information within those environments, or disrupt services by crashing the hypervisor process. This directly impacts the availability of any critical workloads running inside the affected virtual machines. Furthermore, if the vulnerability allows for host escape, the attacker could potentially pivot to compromise other systems on the network that are connected to the same infrastructure, thereby expanding the blast radius significantly beyond the initial point of entry.
This incident aligns with Common Weakness Enumeration categories such as CWE-269 Improper Privilege Management or CWE-787 Out-of-bounds Write if memory corruption is involved, which are common in hypervisor vulnerabilities where boundary checks fail to restrict access to sensitive kernel structures. In terms of the MITRE ATT&CK framework, this vulnerability facilitates techniques related to Local Privilege Escalation and potentially Defense Evasion by allowing an attacker to bypass standard security mechanisms inherent to the Windows operating system. The low attack complexity and lack of user interaction requirements make it particularly dangerous in multi-user environments where multiple individuals have varying levels of access to the host machine hosting virtualized workloads.
To mitigate this risk, immediate patching is essential as Oracle has likely released a fixed version addressing these specific flaws within the core component. Administrators should prioritize updating all instances of Oracle VM VirtualBox on Windows hosts to the latest stable release that includes security fixes for CVEs affecting version 7.2.x and earlier versions where applicable. Additionally, organizations should enforce strict access controls limiting who can log into systems running virtualization software, adhering to the principle of least privilege. Implementing application whitelisting or advanced endpoint detection and response solutions can help detect anomalous behavior associated with exploitation attempts, such as unexpected process creation or memory access patterns typical of heap spraying or buffer overflow attacks commonly used in hypervisor exploits. Regular auditing of host system configurations and monitoring for unauthorized changes to virtual machine settings further strengthens the security posture against such insider threats or compromised low-privileged accounts.