CVE-2026-23562
XAPI RBAC bypass lets vm-admin access host hardware and dom0 files via missing PCI passthrough check
Is CVE-2026-23562 being exploited?
Not confirmed. CVE-2026-23562 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 0.17% probability of exploitation in the next 30 days.
How severe is CVE-2026-23562?
CVE-2026-23562 is rated Critical with a CVSS score of 9.4. 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-2026-23562?
Yes. A fix has been recorded for CVE-2026-23562. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-23562 affect?
CVE-2026-23562 affects XAPI, XenServer, XenCenter, Xen hypervisor. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-23562?
Limit/revoke vm-admin roles, audit passthrough VMs and dom0 access, and apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
A low-privilege vm-admin can bypass RBAC to configure PCI passthrough, access host hardware and read/modify dom0 files, enabling host compromise.
Immediate action required