vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-59565

Local and kernel denial-of-service

HIGH
8.8
CVSS Score
Published: August 24, 2026 at 01:40 PM UTC
Updated: October 12, 2026 at 03:10 PM UTC
1 product affected across 1 vendorClient Connector

Using Client Connector by Zscaler?

Get instant alerts when new vulnerabilities affect Client Connector - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH8.8
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Client Connector· Zscaler
90%
0 ≤ v < Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.3720
Affected range stops below Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.372, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHZscaler
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-229

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card