CVE-2026-53566 Out-of-bounds memory read
An out-of-bounds memory read in the Citrix Secure Access Client for Windows allows attackers to read sensitive memory or cause a crash.
- 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-2026-53566?
CVE-2026-53566 is a medium-severity memory corruption vulnerability in Citrix Secure Access Client for Windows, published on 14 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Out-of-bounds read vulnerability in Citrix Citrix Secure Access Client for Windows.
This issue affects Citrix Secure Access Client for Windows: before 26.6.1.20.
Weakness: CWE-125
Which versions are affected by CVE-2026-53566?
How do I fix CVE-2026-53566?
No fix has been published for CVE-2026-53566 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-53566 being exploited?
There is no known exploitation of CVE-2026-53566 in the wild and no public exploit code.
Sources
Also known as GHSA-x6r5-jm3g-ghrx.