Zscaler Client Connector up to Android 4.1/ChromeOS 4.1/iOS 4.5.0 improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.0$0-$5k1.04+

Summaryinfo

A vulnerability has been found in Zscaler Client Connector up to Android 4.1/ChromeOS 4.1/iOS 4.5.0 and classified as critical. This affects an unknown function. Performing a manipulation results in improper authentication. This vulnerability is reported as CVE-2026-59564. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in Zscaler Client Connector up to Android 4.1/ChromeOS 4.1/iOS 4.5.0. This affects an unknown part. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.

The advisory is shared at help.zscaler.com. This vulnerability is uniquely identified as CVE-2026-59564 since 07/06/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version Android: 4.2, ChromeOS: 4.2, iOS: 4.5.1, Linux: 3.7.2.64, 4.2.1.64, MacOS: 4.5.2.312, 4.7.0.292, 4.8.0.191, Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232 or 4.9.0.372 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 8.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.1
CNA Vector (Zscaler): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Client Connector Android: 4.2/ChromeOS: 4.2/iOS: 4.5.1/Linux: 3.7.2.64/4.2.1.64/MacOS: 4.5.2.312/4.7.0.292/4.8.0.191/Windows: 4.6.0.457/4.7.0.317/4.8.0.232/4.9.0.372

Timelineinfo

07/06/2026 CVE reserved
08/24/2026 +49 days Advisory disclosed
08/24/2026 +0 days VulDB entry created
08/24/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: help.zscaler.com
Status: Confirmed

CVE: CVE-2026-59564 (🔒)
GCVE (CVE): GCVE-0-2026-59564
GCVE (VulDB): GCVE-100-394677

Entryinfo

Created: 08/24/2026 16:00
Changes: 08/24/2026 16:00 (62)
Complete: 🔍
Cache ID: 216::103

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