ZscalerCVE-2026-59565
Zscaler Client Connector: buffer overflow
High8.8CVE-2026-59565 · Published Aug 24, 2026 · updated Aug 28, 2026
A remotely exploitable buffer overflow bug can cause a local and kernel denial-of-service attack on affected versions of Zscaler Client Connector on Windows.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Client Connector Product | < Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.372 | Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.372 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-229
More Zscaler advisories
All Zscaler| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 14 | Zscaler Client Connector: improper input validation | High7.5 | Android: 4.2.0.152+1 more |
| Sep 14 | Zscaler Client Connector: race condition | High8.1 | 4.6.0.486+3 more |
| Aug 24 | Zscaler Client Connector: privilege escalation | High8.8 | Windows: 4.6.0.457+8 more |
| Aug 24 | Zscaler Client Connector: remote code execution | Critical9.1 | Windows: 4.6.0.457+8 more |
| Aug 24 | Zscaler Client Connector: authentication bypass | Critical9.1 | Windows: 4.6.0.457+7 more |
| Aug 24 | Zscaler Client Connector: buffer overflow | High8.4 | Android: 4.2+1 more |