CVE-2026-87271 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 environments. This issue is classified as an easily exploitable privilege escalation or arbitrary code execution vector that requires low-privileged attacker access with valid logon credentials to the underlying infrastructure where the virtualization software operates. The presence of this vulnerability indicates a significant weakness in how VirtualBox handles specific operations within its core architecture, allowing an authenticated user on the host system to bypass expected security boundaries and execute malicious actions with elevated privileges or control over the hypervisor process itself.
From a technical perspective, the flaw enables a low-privileged attacker who has already gained logon access to the Windows machine hosting VirtualBox to compromise the integrity of the virtualization layer. The exploitation mechanism likely involves manipulating internal data structures or API calls within the core module in an unexpected manner, leading to memory corruption or logic errors that result in arbitrary code execution under the context of the VirtualBox process. Since the CVSS 3.1 base score is rated at 7.8 with high impacts on confidentiality, integrity, and availability, it suggests that successful exploitation allows for complete takeover of Oracle VM VirtualBox. This means an attacker could potentially escape from a guest virtual machine to gain control over the host system or manipulate other running virtual machines, effectively neutralizing the isolation guarantees provided by the hypervisor.
The operational impact of this vulnerability is severe due to its potential to lead to full system compromise. If an attacker successfully exploits this flaw, they can achieve takeover of Oracle VM VirtualBox, which may translate into unauthorized access to sensitive data stored on the host or within guest systems, modification of virtual machine configurations, and disruption of services running inside the virtualized environment. The requirement for logon access means that while remote exploitation without authentication is not possible, insider threats or attackers who have compromised a low-privileged user account on the host system can leverage this vulnerability to escalate their privileges significantly. This scenario highlights the risk associated with shared infrastructure where multiple users may have varying levels of access but share the same virtualization platform.
In terms of industry standards and threat modeling, this vulnerability aligns with CWE-78 Improper Neutralization of Special Elements used in an OS Command or similar injection flaws if it involves command execution, or more likely CWE-120 Buffer Overflow or CWE-94 Code Injection depending on the specific memory corruption mechanism. From a tactical perspective within the MITRE ATT&CK framework, this vulnerability facilitates lateral movement and privilege escalation techniques such as T1068 Exploitation for Privilege Escalation or potentially T1055 Process Injection if the attacker injects code into the VirtualBox process to hide their activities. The low attack complexity and lack of user interaction requirements make it particularly dangerous in environments where host security policies are not strictly enforced against local users.
Mitigation strategies must focus on immediate patching and access control hardening. Oracle has released updates addressing this vulnerability, so administrators should apply the latest patches for Oracle VM VirtualBox version 7.2.x immediately to close the exploit vector. Additionally, since the attack requires logon access, enforcing strict least-privilege principles is essential; users who do not require administrative rights or even standard user privileges on the host system should be restricted from installing or running virtualization software. Implementing application whitelisting can prevent unauthorized versions of VirtualBox from executing, and monitoring for unusual process behavior associated with the core component may help detect exploitation attempts in real-time. Regular security audits of host systems to ensure that only authorized personnel have local access are critical to reducing the attack surface for this type of insider or compromised-account threat.