CVE-2026-53563 Persistent Command Execution
Attackers can execute arbitrary commands persistently on Citrix UniconOS systems, requiring an upgrade to patched versions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-53563?
CVE-2026-53563 is a medium-severity command injection vulnerability in Citrix UniconOS, published on 13 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Vulnerability in Citrix UniconOS leading to Persistent Command Execution
This issue affects UniconOS: before 2607.2 CR and before 2603 LTSR CU2.
Weakness: CWE-78
Which versions are affected by CVE-2026-53563?
How do I fix CVE-2026-53563?
No fix has been published for CVE-2026-53563 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-53563 being exploited?
There is no known exploitation of CVE-2026-53563 in the wild and no public exploit code.
Sources
Also known as GHSA-jq59-m47r-c584.