Vulnerability · Published Aug 24, 2026 · Assigned by Zscaler
CVE-2026-59566Local denial-of-service
High 8.4
In plain English
A high-severity security flaw in Client Connector from Zscaler. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Severity (CVSS 3.1)8.4High
Exploit odds (30 days)0.2%top 92.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Zscaler | Client Connector | 0 – before Android: 4.20 – before ChromeOS: 4.2 |
Weakness: CWE-229 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H