CVE-2026-87270 in VM VirtualBox
Summary
by MITRE • 09/16/2026
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 systems. This issue is classified as an easily exploitable vulnerability that permits low-privileged attackers to compromise the integrity and availability of the virtualization platform. The attack vector requires local access with valid logon credentials on the infrastructure where Oracle VM VirtualBox executes, indicating that remote exploitation without authentication is not possible for this specific flaw. However, once an attacker gains even minimal user-level access to the host operating system, they can leverage this weakness to achieve full control over the virtualization environment. The severity of this vulnerability is underscored by a CVSS 3.1 Base Score of 7.8, which reflects high impacts on confidentiality, integrity, and availability. This score aligns with CWE-269, Improper Privilege Management, as it involves an elevation of privilege from a low-level user to complete system takeover within the context of the VirtualBox process.
From a technical perspective, vulnerabilities in virtualization cores often stem from insufficient validation of inputs or improper handling of state transitions between the host and guest environments. In this instance, the flaw allows an attacker with local access to manipulate internal structures or memory states that are not properly restricted by standard user-level permissions. This lack of strict isolation enforcement enables the attacker to execute arbitrary code within the context of the VirtualBox process, which typically runs with elevated privileges relative to normal application processes on Windows systems. The ability to take over Oracle VM VirtualBox effectively grants the attacker control over all virtual machines hosted on that instance, potentially leading to data exfiltration from guest operating systems or lateral movement into other network segments if those guests are connected to internal networks. This scenario is consistent with ATT&CK technique T1055, Process Injection, and T1068, Exploitation for Privilege Escalation, as the attacker exploits a weakness in process isolation to escalate privileges and maintain persistence within the virtualized environment.
The operational impact of this vulnerability extends beyond the immediate compromise of the VirtualBox application itself. Since Oracle VM VirtualBox is often used for development, testing, and potentially production workloads on Windows hosts, a successful takeover can lead to significant data breaches depending on the sensitivity of information stored in guest operating systems. Attackers could access sensitive files, credentials, or proprietary code residing within virtual machines that may not be adequately secured at the network level due to their trusted relationship with the host. Furthermore, because the vulnerability affects availability, an attacker could also disrupt services by crashing the VirtualBox process or corrupting disk images associated with guest systems. This dual impact on both confidentiality and integrity makes it a high-risk issue for organizations relying on virtualization for critical operations, particularly in environments where multiple users share access to development machines running Windows hosts.
Mitigation strategies must focus on strict access control and timely patch management given the local nature of the attack vector. Organizations should enforce least-privilege principles by ensuring that only trusted administrators have logon rights to systems hosting Oracle VM VirtualBox instances. Regular audits of user accounts with local administrative or elevated privileges can reduce the pool of potential attackers capable of exploiting this flaw. Additionally, deploying host-based intrusion detection systems and application whitelisting solutions can help identify suspicious activities originating from low-privileged users attempting to interact with virtualization processes. It is imperative for administrators to apply the latest security updates provided by Oracle as soon as they become available, as version 7.2.16 is explicitly listed as affected while newer versions may contain patches addressing this core vulnerability. Continuous monitoring of system logs for anomalous behavior related to VirtualBox process execution will also aid in early detection and response to potential exploitation attempts.