Improper access control in XenAPI Server - CVE-2026-42486
Published: April 29, 2026
Vulnerability identifier: #VU128450
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-42486
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
XenAPI Server
XenAPI Server
Software vendor:
Xen Project
Xen Project
Description
The vulnerability allows a remote user to write arbitrary files in dom0.
The vulnerability exists due to improper access control in VM.platform:hvm_serial when modifying VM platform parameters. A remote user can set the hvm_serial parameter to write arbitrary files in dom0.
The vulnerability is exposed only when RBAC is configured for the pool.
Remediation
Install security update from vendor's website.