CVE-2018-14007: Citrix XenServer directory traversal flaw

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 19 September 2026. Confidence: medium.

critical priorityCVSS 9.8 with network reachability, no authentication and high EPSS percentile make this a top remediation target despite the thin description.

What it is

Citrix XenServer 7.1 and newer contains a directory traversal vulnerability (CWE-22) that lets a remote, unauthenticated attacker reach files outside the intended path. The record gives no further detail on the vulnerable component or the exact traversal mechanism, so defenders must rely on the vendor advisory for specifics.

Impact

An attacker could read or otherwise access files outside the intended directory, potentially exposing sensitive host or management data. The CVSS vector rates confidentiality, integrity and availability impact as high, so full compromise of the affected component is possible.

Attack surface

The flaw is network reachable with no authentication and no user interaction required (AV:N/AC:L/PR:N/UI:N). It is reached over the network against the XenServer management or service interface, though the record does not name the exact endpoint.

Exploitation

Not listed in CISA KEV and no public exploit tag appears in the references, but EPSS is 0.56147 (99th percentile), indicating a high predicted likelihood of exploitation activity.

What to do

• Apply the Citrix XenServer update referenced in vendor advisory CTX236548 and Xen advisory XSA-271.
• Restrict network access to XenServer management interfaces to trusted administrative networks only.
• Audit file and directory permissions on XenServer hosts to limit what a traversal could expose.
• Monitor for unexpected file access patterns on XenServer hosts and alert on anomalous reads outside normal paths.

Detection

• Review XenServer and web/service logs for traversal sequences such as ../ or encoded variants in request paths.
• Alert on file access events outside expected directories on XenServer hosts.
• Correlate outbound or lateral connections from XenServer management interfaces with unusual file read activity.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.