CVE-2026-59565
Local and kernel denial-of-service
Description
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.
INFO
Published Date :
Aug. 24, 2026, 2:16 p.m.
Last Modified :
Aug. 24, 2026, 2:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 73c6f63b-efac-410d-a0a9-569700f85a04 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update Zscaler Client Connector to the latest version.
- Apply vendor-released security patches immediately.
- Restart the affected system if required.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-59565.
| URL | Resource |
|---|---|
| https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-59565 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-59565
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-59565 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-59565 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Aug. 24, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Zscaler', 'product': 'Client Connector', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': 'Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.372', 'versionType': 'custom'}], 'platforms': ['Windows'], 'defaultStatus': 'affected'}] Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-229 Added Reference https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026