CVE-2026-59566 Local denial-of-service
A local buffer overflow in Zscaler Client Connector allows attackers to cause a denial-of-service on Android and ChromeOS devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-59566?
CVE-2026-59566 is a high-severity denial of service vulnerability in Zscaler Client Connector, published on 24 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A locally exploitable buffer overflow bug can cause a local denial-of-service attack on affected versions of Zscaler Client Connector on Android and ChromeOS.
Weakness: CWE-229
Which versions are affected by CVE-2026-59566?
How do I fix CVE-2026-59566?
No fix has been published for CVE-2026-59566 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-59566 being exploited?
There is no known exploitation of CVE-2026-59566 in the wild and no public exploit code.
Sources
Also known as GHSA-j5x2-m45x-3cp3.