Unauthenticated Access Vulnerability in Oracle VM VirtualBox
CVE-2026-21986

7.1HIGH

Key Information:

Vendor

Oracle
Status
Oracle Vm Virtualbox
Vendor
CVE Published:
20 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-21986?

A vulnerability exists in Oracle VM VirtualBox that allows an unauthenticated attacker with access to the infrastructure where the software is deployed to exploit the system. This can lead to unauthorized control over Oracle VM VirtualBox, resulting in potential service disruptions such as frequent crashes or hangs. This vulnerability specifically affects Windows VMs running the supported versions of the product, with higher susceptibility to severe impact scenarios.

Affected Version(s)

Oracle VM VirtualBox 7.1.14

Oracle VM VirtualBox 7.2.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-21986-VirtualBox-DoS
Created by MohaBars

References

https://www.oracle.com/security-alerts/cpujan2026.html
vendor-advisory

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.