Local and kernel denial-of-service

Answer in brief

CVE-2026-59565 records a Unknown severity vulnerability in Local and kernel denial-of-service. The current sources do not mark it as known exploited. The current feed maps Zscaler/Client Connector (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 24, 2026Updated Aug 24, 2026Source checked Aug 24, 2026First seen by HOL Aug 24, 2026Material review Aug 24, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Zscaler/Client Connector (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Zscaler/Client Connectorgeneric	>=0 <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

Recommended response

Check inventory. Check lockfiles and deployed manifests for Zscaler/Client Connector.
Review the reported fix. Update Zscaler/Client Connector to Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.372 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 24, 2026

Sources and claim methodology

Source referencehelp.zscaler.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.