Description
Improper link resolution before file access ('link following') vulnerability in Citrix UniconOS.

This issue affects UniconOS: before 2607 CR and before 2603 LTSR CU2.
Published: 2026-10-13
Score: 8.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Local Privilege Escalation
Action: Immediate Patch
AI Analysis

Impact

The vulnerability arises from improper link resolution before file access, allowing a user to force the operating system to follow symbolic links that point to files or directories they should not be able to access. This flaw, categorized as CWE‑59, can let a local account read or modify protected data and ultimately gain higher privileges on the affected system.

Affected Systems

Citrix UniconOS releases prior to 2607 CR and prior to 2603 LTSR CU2 are affected. The operating systems lack the checks required to prevent link following when file permissions are insufficient, leaving them open to local privilege escalation.

Risk and Exploitability

The CVSS score of 8.5 indicates high severity. EPSS data is not available, and the vulnerability is not listed in the CISA KEV catalog. Because it requires local access, the attack vector is likely local. A local user can create a malicious link to a protected resource and exploit the flaw, achieving privilege escalation without remote access. The overall risk remains high for any environment where local users can manipulate filesystem links.

Generated by OpenCVE AI on October 13, 2026 at 19:35 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the Citrix UniconOS security update that includes version 2607 CR or 2603 LTSR CU2, which removes the link‑following flaw.
  • Reboot the affected systems to ensure the updated filesystem logic is active.
  • Restrict local user permissions so that only privileged accounts can create or modify symbolic links in directories that contain sensitive configuration or system files.

Generated by OpenCVE AI on October 13, 2026 at 19:35 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Tue, 27 Oct 2026 04:30:00 +0000

Type Values Removed Values Added
First Time appeared Citrix
Citrix uniconos
Vendors & Products Citrix
Citrix uniconos

Tue, 13 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 13 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
Description Improper link resolution before file access ('link following') vulnerability in Citrix UniconOS. This issue affects UniconOS: before 2607 CR and before 2603 LTSR CU2.
Title Local Privilege Escalation
Weaknesses CWE-59
References
Metrics cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Citrix

Published:

Updated: 2026-10-13T19:31:30.536Z

Reserved: 2026-06-09T18:32:47.375Z

Link: CVE-2026-53562

cve-icon Vulnrichment

Updated: 2026-10-13T19:21:30.403Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-13T17:17:41.147

Modified: 2026-10-14T16:04:11.750

Link: CVE-2026-53562

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-26T22:50:25Z

Weaknesses
  • CWE-59

    Improper Link Resolution Before File Access ('Link Following')