CVE-2026-21955
Local privilege escalation in Oracle VM VirtualBox core.
Is CVE-2026-21955 being exploited?
Not confirmed. CVE-2026-21955 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.27% probability of exploitation in the next 30 days.
How severe is CVE-2026-21955?
CVE-2026-21955 is rated High with a CVSS score of 8.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-21955?
Yes. A fix has been recorded for CVE-2026-21955. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-21955 affect?
CVE-2026-21955 affects Oracle VM VirtualBox 7.1.14, Oracle VM VirtualBox 7.2.4. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-21955?
Patch upgrade to patched VirtualBox release
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local attacker with logon can gain full control of the host running VirtualBox, impacting host and guest VMs.
Immediate action required
- affected7.1.14
- affected7.2.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.