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Vulnerability · Published Jan 20, 2026 · Assigned by oracle

CVE-2026-21986

High 7.1

In plain English

A high-severity security flaw in Oracle VM VirtualBox from Oracle Corporation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.2%top 89.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official 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. Easily exploitable vulnerability allows unauthenticated 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 unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle VM VirtualBox. Note: This vulnerability applies to Windows VMs only. CVSS 3.1 Base Score 7.1 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Ubuntu:22.04:LTSvirtualboxno fix listedUBUNTU-CVE-2026-21986
Ubuntu:24.04:LTSvirtualboxno fix listedUBUNTU-CVE-2026-21986
Ubuntu:25.10virtualboxno fix listedUBUNTU-CVE-2026-21986
Ubuntu:26.04:LTSvirtualboxno fix listedUBUNTU-CVE-2026-21986
Ubuntu:26.10virtualboxno fix listedUBUNTU-CVE-2026-21986

Affected products (as reported)

VendorProductVersions
Oracle Corporation Oracle VM VirtualBox 7.1.147.2.4

References