CVE-2026-53563

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Persistent Command Execution in Citrix UniconOS

Publication date: 2026-10-13

Last updated on: 2026-10-14

Assigner: Citrix Systems, Inc.

Description

Vulnerability in Citrix UniconOS leading to Persistent Command Execution This issue affects UniconOS: before 2607.2 CR and before 2603 LTSR CU2.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-14

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-53563

EUVD

EUVD-2026-100753

Affected Vendors & Products

Vendor	Product	Version / Range
Citrix	UniconOS	0
Citrix	UniconOS	0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-78	The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability affects Citrix UniconOS versions before 2607.2 CR and before 2603 LTSR CU2. It allows persistent command execution, meaning an attacker could execute commands that remain active even after the initial compromise.

Impact Analysis

An attacker could gain unauthorized access to the system, execute malicious commands, and maintain persistence. This could lead to data theft, system damage, or further network compromise.

Mitigation Strategies

Update UniconOS to version 2607.2 CR or later, or apply 2603 LTSR CU2 if using the LTSR branch. Remove unauthorized persistent commands if detected.

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