CVE-2026-59567

Local privilege escalation

Published Aug 24, 2026 · Updated Aug 25, 2026

Local privilege escalation in Zscaler Client Connector allows local users to execute arbitrary code in a privileged context. Zscaler identifies multiple flaws involving improper handling of insufficient permissions but has not published the affected components or operations performed on attacker-controlled input. Access requires an unprivileged local account; successful exploitation crosses into a privileged context and permits arbitrary code execution without another user's interaction.

CVSS severity8.8
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in Zscaler Client Connector allows local users to execute arbitrary code in a privileged context. Zscaler identifies multiple flaws involving improper handling of insufficient permissions but has not published the affected components or operations performed on attacker-controlled input. Access requires an unprivileged local account; successful exploitation crosses into a privileged context and permits arbitrary code execution without another user's interaction.

The record

CVE
CVE-2026-59567
Published
Aug 24, 2026
Updated
Aug 25, 2026
Vendor
Zscaler
Product
Zscaler Client Connector
Classifications
CWE-280, CAPEC-233, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <Linux: 3.7.2.64, 4.2.1.64
  2. Affected versionversion=0 <MacOS: 4.5.2.312, 4.7.0.292, 4.8.0.191
  3. Affected versionversion=0 <Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0372

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Zscaler · Zscaler Client Connectorversion=0 <Linux: 3.7.2.64, 4.2.1.64; version=0 <MacOS: 4.5.2.312, 4.7.0.292, 4.8.0.191; version=0 <Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0372

Published CVSS scores

8.8ZscalerCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-280Improper Handling of Insufficient Permissions or Privileges
CAPEC-233Privilege Escalation
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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