# Zscaler vulnerabilities

Source: https://junglewise.ai/threats/vendors/zscaler  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/zscaler.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 11 vulnerabilities in Zscaler: 0 in the last 7 days and 10 in the last 90 days, 2 of them critical and 0 exploited in the wild. The most recent, CVE-2026-59563, was published on 28 September 2026. Nothing in the last four weeks, down from 5 vulnerabilities in the four before. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 10
- All time: 11 (2 critical, 0 exploited in the wild)

## About Zscaler

Zscaler is a cloud security company that provides web security, sandboxing, and next-generation firewalls.

## Latest Zscaler vulnerabilities

- [CVE-2026-59563: Zscaler MCP Server HMAC token replay vulnerability](https://junglewise.ai/threats/cve-2026-59563-zscaler-mcp-server-versions-0-7-0-and-0-7-1-has-an-issue-where) (medium, CVSS 4.6, published 28 Sep 2026)
- [CVE-2026-25684: Zscaler Internet Access file type control bypass](https://junglewise.ai/threats/cve-2026-25684-zscaler-internet-access-file-type-control-bypass) (medium, CVSS 4.4, published 18 Sep 2026)
- [CVE-2026-59570: Zscaler Client Connector peer app access control bypass](https://junglewise.ai/threats/cve-2026-59570-zscaler-client-connector-peer-app-access-control-bypass) (high, CVSS 7.5, published 14 Sep 2026)
- [CVE-2026-59569: Zscaler Client Connector improper input validation on Android and ChromeOS](https://junglewise.ai/threats/cve-2026-59569-zscaler-client-connector-improper-input-validation-on-android-and) (high, CVSS 8.1, published 14 Sep 2026)
- [CVE-2026-25687: Zscaler Client Connector race condition in ZPA tunnel handler](https://junglewise.ai/threats/cve-2026-25687-zscaler-client-connector-race-condition-in-zpa-tunnel-handler) (high, CVSS 8.1, published 14 Sep 2026)
- [CVE-2026-59568: Zscaler Client Connector remote code execution](https://junglewise.ai/threats/cve-2026-59568-zscaler-client-connector-remote-code-execution) (critical, CVSS 9.1, published 24 Aug 2026)
- [CVE-2026-59567: Zscaler Client Connector local privilege escalation](https://junglewise.ai/threats/cve-2026-59567-zscaler-client-connector-local-privilege-escalation) (high, CVSS 8.8, published 24 Aug 2026)
- [CVE-2026-59566: Zscaler Client Connector buffer overflow on Android and ChromeOS](https://junglewise.ai/threats/cve-2026-59566-zscaler-client-connector-buffer-overflow-on-android-and-chromeos) (high, CVSS 8.4, published 24 Aug 2026)
- [CVE-2026-59565: Zscaler Client Connector buffer overflow denial-of-service](https://junglewise.ai/threats/cve-2026-59565-zscaler-client-connector-buffer-overflow-denial-of-service) (high, CVSS 8.8, published 24 Aug 2026)
- [CVE-2026-59564: Zscaler Client Connector authentication bypass](https://junglewise.ai/threats/cve-2026-59564-zscaler-client-connector-authentication-bypass) (critical, CVSS 9.1, published 24 Aug 2026)
- [CVE-2026-22569: Zscaler Client Connector inspection bypass on Windows](https://junglewise.ai/threats/cve-2026-22569-zscaler-client-connector-inspection-bypass-on-windows) (medium, CVSS 5.4, published 31 Mar 2026)

## Most severe Zscaler vulnerabilities

- [CVE-2026-59568: Zscaler Client Connector remote code execution](https://junglewise.ai/threats/cve-2026-59568-zscaler-client-connector-remote-code-execution) (critical, CVSS 9.1, published 24 Aug 2026)
- [CVE-2026-59564: Zscaler Client Connector authentication bypass](https://junglewise.ai/threats/cve-2026-59564-zscaler-client-connector-authentication-bypass) (critical, CVSS 9.1, published 24 Aug 2026)
- [CVE-2026-59565: Zscaler Client Connector buffer overflow denial-of-service](https://junglewise.ai/threats/cve-2026-59565-zscaler-client-connector-buffer-overflow-denial-of-service) (high, CVSS 8.8, published 24 Aug 2026)
- [CVE-2026-59567: Zscaler Client Connector local privilege escalation](https://junglewise.ai/threats/cve-2026-59567-zscaler-client-connector-local-privilege-escalation) (high, CVSS 8.8, published 24 Aug 2026)
- [CVE-2026-59566: Zscaler Client Connector buffer overflow on Android and ChromeOS](https://junglewise.ai/threats/cve-2026-59566-zscaler-client-connector-buffer-overflow-on-android-and-chromeos) (high, CVSS 8.4, published 24 Aug 2026)
- [CVE-2026-25687: Zscaler Client Connector race condition in ZPA tunnel handler](https://junglewise.ai/threats/cve-2026-25687-zscaler-client-connector-race-condition-in-zpa-tunnel-handler) (high, CVSS 8.1, published 14 Sep 2026)
- [CVE-2026-59569: Zscaler Client Connector improper input validation on Android and ChromeOS](https://junglewise.ai/threats/cve-2026-59569-zscaler-client-connector-improper-input-validation-on-android-and) (high, CVSS 8.1, published 14 Sep 2026)
- [CVE-2026-59570: Zscaler Client Connector peer app access control bypass](https://junglewise.ai/threats/cve-2026-59570-zscaler-client-connector-peer-app-access-control-bypass) (high, CVSS 7.5, published 14 Sep 2026)
- [CVE-2026-22569: Zscaler Client Connector inspection bypass on Windows](https://junglewise.ai/threats/cve-2026-22569-zscaler-client-connector-inspection-bypass-on-windows) (medium, CVSS 5.4, published 31 Mar 2026)
- [CVE-2026-59563: Zscaler MCP Server HMAC token replay vulnerability](https://junglewise.ai/threats/cve-2026-59563-zscaler-mcp-server-versions-0-7-0-and-0-7-1-has-an-issue-where) (medium, CVSS 4.6, published 28 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 5 vulnerabilities in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 5 | 2 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 4 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 1 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Zscaler technologies

- [Zscaler Client Connector](https://junglewise.ai/threats/technologies/client-connector): 9 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Zscaler vulnerabilities", https://junglewise.ai/threats/vendors/zscaler, 9 November 2026.