Improper input validation in Oracle VM VirtualBox - CVE-2026-21988

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Main Vulnerability Database Vulnerabilities #VU121762

Improper input validation in Oracle VM VirtualBox - CVE-2026-21988

Published: January 20, 2026


Vulnerability identifier: #VU121762
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-21988
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability: No public exploit available
Vendor: Oracle
Affected software:
Oracle VM VirtualBox

Detailed vulnerability description

The vulnerability allows a local privileged user to execute arbitrary code.

The vulnerability exists due to improper input validation within the Core component in Oracle VM VirtualBox. A local privileged user can exploit this vulnerability to execute arbitrary code.


How to mitigate CVE-2026-21988

Install updates from vendor's website.

Sources