CVE-2026-59570 Android ZCC denial of service
A pre-installed peer app can disrupt the Zscaler tunnel, force logout, and toggle packet capture, causing denial of service and security bypass.
- 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-2026-59570?
CVE-2026-59570 is a high-severity denial of service vulnerability in Zscaler Client Connector, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
On affected versions of Zscaler client connector, a pre-installed peer app can tear down the Zscaler tunnel, force user logout, and toggle packet capture.
Weakness: CWE-20
Which versions are affected by CVE-2026-59570?
How do I fix CVE-2026-59570?
No fix has been published for CVE-2026-59570 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-2026-59570 being exploited?
There is no known exploitation of CVE-2026-59570 in the wild and no public exploit code.
Sources
Also known as GHSA-cj79-f7p8-r2fv.